Archive of Our Own

“Grace big.” 

“Hm?” Grace grunted. He glanced over at Rocky where he was working on something or other in his carapace-fitted xenonite suit a few feet away from where Grace was seated at the lab table. 

Rocky huffed impatiently; he hated repeating himself. “Grace very large.”

Grace chuckled. “Eh, not really. I’m actually only a few inches taller than the average American male. Think average is around sixty-nine inches, or five foot nine—somewhere around there, maybe its changed in the last few years while I’ve been gone but when I—”

“No.” Rocky said, cutting Grace off. “Grace big.” His carapace did a slow tilt in a very pointed ‘look down’ kind of motion. 

Grace swallowed hard and looked away from Rocky with another laugh, albeit more awkward and forced than before as he reached for the pipette.

“That’s kinda something you’re supposed to pretend you haven’t noticed, pal.” He said stiffly and adjusted his weight on the chair. Maybe if he just silently acknowledged and made peace with how pink his face was it would go away. 

“Already notice. No shut off noticing. Grace know this.” Rocky said plainly as he continued to tinker and ignored Grace’s quiet meltdown.

Grace held the pipette like a lifeline and attempted to swallow with a parched throat, felt the sweat accumulating rapidly in his curled palm and under his arms and he closed his eyes for a few moments. 

There was nothing actually wrong with the comment Rocky made; it was fine, true even, not that big of a deal. 

But just because he couldn’t not notice it did that mean he had to mention it out loud? 

Apparently the answer was yes.

Then again arguably at least a third of the observations Rocky made he could do without making in Grace’s opinion but he would never tell his friend to shut up or stop asking so many questions and had long since gotten used to his brutally direct communication style. 

“Grace uncomfortable with observation question?” Rocky asked, his high trilling tone was sweet as sugar. 

“Nope!” Grace croaked and shook his head before he got back to work and looked down at the microscope slide again. “It’s fine.” 

Rocky hummed and there was a wonderful, blissful quiet for a few moments as Grace practically glued his eyeball to the magnifying lens like it was a new bodily attachment. 

He was quite busy; this was very important. 

However the quiet didn’t last and when Rocky spoke again he sounded closer. “Grace sexual organ big big big. Substantial. Rocky conduct research, Grace above average in girth and len–”

Grace immediately reared back from the microscope in shock and looked down, horrified, to see his overly eager best friend right under his feet, clicking his claws together with interest. 

“Rocky curious exact measurement. Compare research findings. Closer look required. For science. Grace remove clothing now.” He was practically purring up at him.

“Nope!” Grace squeaked and he quickly scrambled out of his chair from the opposite side and powerwalked back towards the dormitory and away from his newly penis-obsessed roommate. 

He didn’t know what was up with the little guy but this behavior was weird and Grace wanted nothing to do with any of it, thanks very much, the ‘for science’ excuse be damned.

While some small part of him was flattered (not that part) the majority was embarrassed by the line of questioning and the blatant interest and once he got back to their room he threw himself dramatically onto the bed and tossed the covers over his head to hide.

Grace wasn’t dumb. He knew what he had and he also knew it garnered a lot of interest and attention once people were made aware. During his time on Earth he’d grown to resent his apparent considerable attachment rather than appreciate it for what it was. To him it was a nuisance, a distraction; a fifth limb he was stuck with but could do nothing overtly useful with. 

It’s not as if he were some virgin, no, he’d had sex. He’d…used it. To varying levels and degrees of success. And it’s not as if he didn’t enjoy the sex, he had! Mostly. Kind of. The small handful of women he was with definitely did so that was a job well done in his book even if the pleasure he’d experienced had been secondary not just to them but to himself as well. 

He’d just found more often than not after completion–when his dumb brain chose to allow it–that his body would experience the expected pleasurable sensations with the emotional euphoric high for only a moment before he’d be met with a near overwhelming crushing weight that ultimately left him feeling hollowed out. Grace had never been able to fully understand what it was, let alone try to explain it to his bed partners. 

The worst were by far the times when he got too into his own head and couldn’t get off at all, followed by ones with him stupidly faking an orgasm which, shockingly, never went over well. It usually meant his romantic evenings ended with arguments, accusations of not ‘being good enough for him’, or worse—yet more true—that ‘something was wrong with him’ before they stole away into the night with tears and further harsh words and slammed doors. 

The only truly memorable and pleasurable sexual encounters he recalled having were during his longest relationship and even then it had taken him ages to finally experience the post-coital glow he’d only ever heard about. Adding further insult to injury was that it had just begun happening only about a month prior to their break up where Grace was then left alone again to wonder whether starting the painful process all over was even worth it. 

He knew it was his fault, it was always his fault; there was nothing wrong with any of his sexual partners. It wasn’t their fault that all he’d do was go through the motions in a cruel pantomime of intimacy while feeling nothing but emptiness. The more he did it the more it felt like a betrayal to himself and to his partners. 

He’d grown to hate it (himself) for a time and ignored his libido and any potential romantic interest or involvements until after enough time had passed and the need dulled to a low ache that he could live with. He found little use in even attempting to date when the outcome would inevitably be the same and Grace would be found lacking.  

The anger and frustration grew way to bitter acceptance and eventually resentment of his own body and while he still masturbated from time to time he could usually will it away with complicated equations or quick cold showers. 

It’s not as if he were upset with Rocky because he said something wrong; he had merely reminded him of his previous failures and what he’d missed out on because of some stupid, broken part inside of him—what he was doomed to never experience again.

He wanted so badly to truly enjoy sex, to enjoy the closeness and intimacy with his chosen person but he’d never been able to find it.

And now he never would. 

Grace groaned loudly and burrowed further into the covers. What the heck was up with his friend, why did he have to say all that and go and make Grace feel sad and think sad things. 

From beneath his safe haven of blankets he heard the tell tale clack-click of the flexible xenonite covered rock hitting against the flooring as Rocky waddled closer before there was silence. Grace wriggled beneath the covers, knowing his hiding was useless since Rocky could see him regardless but he didn’t care; it made him feel better and that was what mattered.  

“Grace uncomfortable statement.” The voice came from somewhere over his right shoulder and he felt the skin on the back of his neck prickle under the weight of Rocky’s attention. 

Grace grumbled a nonsensical reply. He knew he was being childish and dumb and was aware that Rocky’s unending persistent nature meant he would have to face this sooner or later. He was truly a dog with a bone and once he was interested in something he rarely took no for an answer.

“Grace uncomfortable with large penis question?”

Grace threw back the covers with another exaggerated groan. Fine, guess they were doing this then.

“No, Rock.” He said, maneuvering his body to let his legs hang over the edge of the bed and look at Rocky where he hovered near the corner of the room. “It’s complicated. Human sexuality is weird. I’m weird.”

Rocky scoffed. “Know this.” He waved a dismissive claw before gesturing at Grace to continue. “Grace explain discomfort with penis now.”

Grace sighed, considering. He wondered the merits of going over every spectrum of human sexuality as he knew and understood it along with a little psychology pop quiz or if he could get away with just the basics and bare bones explanation as to why he’d reacted like such a wet cat. 

“My penis is fine; the problem is sex. I also like sex but it just doesn’t seem to like me very much.” 

Rocky stared at Grace with a small questioning trill, shifting his weight from side to side. When no clarification was immediately forthcoming the trill became more agitated and his vents rumbled. 

“What mean question? Sex not enjoy Grace question? Stupid stupid stupid. Sex lucky to have Grace.” 

A small smile quirked Grace’s lips up at the rather silly compliment but he quickly wiped it away with the back of his palm and cleared his throat. 

“I just mean that I have a weird hang up around sex, or something, or maybe I’ve just never had good sex. I dunno…I feel like I never got fully into it with the people I chose to sleep with. It usually went poorly and they thought they did something wrong or weren’t attractive enough. It’s not like it didn’t feel good because it did it just. Like—I don’t know I think a part of me also felt used. Like they all wanted this thing—” Grace gestured crudely down at his crotch. “---but didn’t necessarily care for what was attached to it.” 

He honestly hadn’t meant to say that much, he realized after. It just came out in a torrential rush and once it was out there he was surprised to realize he felt a little lighter for it. It was the kind of topic that was difficult to confide in or share back home; he'd never felt comfortable sharing his bedroom problems. No one would take him seriously, all they’d hear was “My dick is too big and no one loves me.” There was no potential conversation where he saw that going well unless it was with a therapist and he’d certainly never spoken to one about this.

“So, it’s not that I hate my penis, per se, it’s just caused more problems than anything so I’m mostly ambivalent about it. It’s just kinda there these days.”

Rocky watched him while he hummed quietly, considering, and Grace wondered what he was thinking about. Then he walked closer to where Grace perched on the edge of his bed and stopped in front of him. 

Grace told himself not to tense up; it was just Rocky–his best friend Rocky–even if he had been acting all kinds of strange today. 

Tentatively, gently, Rocky reached a claw up and placed it on Grace’s knee.

“Rocky apology. Understand Grace now and can help.” 

Grace made a small noise and reached an equally tentative hand out to place his palm gently on the petite claws covering his knee. 

“What do you mean ‘help’?”

Rocky’s hand slid slowly up Grace’s thigh and the movement knocked Grace’s own hand free and he watched, with a somewhat detached horror, as it edged closer and closer towards the juncture at his thighs but stopped just short of anything inappropriate. 

“Understand.” Rocky purred, and the low quality of his voice made Grace shiver. “Grace not have good sex. Rocky fix. Rocky satisfy Grace best.” 

It twitched expectantly in Grace’s pants at the sultry words and he prayed Rocky didn’t notice (he knew Rocky noticed.)

“Uhm—” Grace choked eloquently frozen in—not fear, he wasn’t afraid of his friend, but he also had no idea what the heck was going on and his fight-or-flight mode kicked in with the dial landing right smack in the middle of the two. “Are you trying to have sex with me right now, Rock?” Just to be clear, just trying to lay it all out there.

“Yes.” Rocky said and this time when he lifted his hand from Grace’s inner thigh it was with a purpose and Grace gasped, knocking it away from where it ventured too close to his increasingly interested cock and scooted back and away from Rocky to lean against the wall, legs curled to his chest. 

“Rocky what’s—why are you acting like this? What’s going on?” 

Rocky, for his part, did look properly chagrined by the response to his advances and he shook his carapace roughly as though clearing away an intrusive thought. 

“Apology. Experiencing typical biological occurrence, approaching peak egg cycle. Rocky okay many years with self-stimulate and release. Current cycle is—” He warbled a bit, hands wringing nervously. “Different. Body register Grace as potential mate and is excite. Wants.”

Grace’s eyebrows shot towards his hairline. So in other words–or as far as Grace could make sense of it for a human body equivalent–Rocky was ovulating and feeling horny about it. Color him immediately invested.

“You see me as a potential mate? Isn’t that, I mean—” He floundered a bit, spluttered over the words, wondering how he could say this without sounding insensitive or cruel. “--impossible? Just given the, you know. Biological differences between us.”

Rocky hummed again, “Grace correct yes. Egg fertilization not possible–” More nervous hand wringing, trilling. “--body still respond positively to Grace. Want want want. Is possible mate with no offspring.”

So they could still have sex somehow even if Grace couldn’t actually get Rocky pregnant (it twitched in interest again at the thought which Grace dutifully ignored) and it would still help him get through his cycle. 

Grace, shockingly, found himself more interested than repulsed by the idea and he edged forward a little from his huddled stance against the pod wall. 

“Isn’t your body supposed to biologically react to other Eridians? I’m not an Eridian.” Grace commented unhelpfully, as if it’s a fact they weren’t already well aware of, but he was curious and had to know.

Rocky, to his credit, simply shimmied in agreement rather than make a snarky comment. 

“Grace correct yes,” He said again then paused, tilted down in a way that Grace could only surmise to be his way of showing shyness. “Rocky experience high emotion for Grace. Strong feeling. Body feel safe, secure. Rocky trust Grace and wants. Sees Grace as mate.”

A sudden lump formed in Grace’s throat with the admission and he mentally counted to three slowly, several times over, determined to not cry. 

“Wow,” was all he managed to say and it came out in a wobbly whisper, too overcome with emotion to say anything else without completely breaking down. 

Love. Rocky loved him. He cared and trusted Grace enough that his freakin’ bodily composition did a complete 180 and rejected his own biology and registered him as mate even with his own lack of needed equipment to help it produce offspring. 

What the actual heck!

No, actually, this might be worthy of at least a few tears and Grace felt them fall before he was even acknowledging their existence and sniffled pathetically.

“Rock…” He sniffled again and made grabby hands for his best buddy as he slid off the bed. He crawled towards Rocky and let himself be cooed at and pulled into solid, warm arms. 

Rocky graciously allowed the hug and subsequent leaky human emotions of it all for a while before he started to get squirmy and gently unwrapped his limbs from Grace to pull back. 

Grace sniffed hard and rubbed a sleeve over his nose attractively to wipe away the worst of the leak before giving Rocky a small, private small.

“Love you too, bud.” He said quietly. 

Rocky was thrilled despite the leaky display Grace forced him to be privy to at such close proximity and he trilled and made jazz hands at Grace excitedly. 

“Rocky know. Nice to hear. Thank.” 

Grace’s smile widened and he tightened his loose hold around his friend—boyfriend? What were they now? Mates?—happy and content to just sit and bask in the post-confessional glow. 

Rocky allowed it for several minutes before he chirped impatiently, his body gently disengaged from Grace’s hold and raised to the tips of his claws to look down at Grace where he hunched on the floor with a now confused head tilt.

“Grace Rocky fuck now question?”

Grace’s jaw dropped. “Who taught you that?!”

Rocky chittered amusedly and skittered towards the door and left Grace scrambling to stand in his wake.

“World wide web provide many resources. Educational. Rocky learn a lot. Grace come now. Sex time.”  Rocky’s impatience and excitement was evidenced in the little tippy-taps of his feet and swaying carapace in the doorway.

“I didn’t even say yes Rock, jeez,” Grace muttered while already on his way over to Rocky’s side. “Can’t we just take a moment to talk this over some more? This is kind of a big ste–” He cut off with a high squeak-whine that he would deny until his dying breath.

One of Rocky’s claws had raised and started to paw at Grace’s crotch, making it twitch and become infinitely more interested in the proceedings.

“Grace.” Rocky said once he had his attention and his tone was back to that low, rhythmic rumble-purr that Grace was quickly finding himself becoming addicted to. He raised himself to be ‘eye’ level with Grace's stomach. 

“Rocky need now.” With the words Rocky stopped his playful cock batting and instead gave it a firm yet gentle squeeze through his pants. “Inside Rocky now.”

Grace swallowed hard, frozen in place but also not really wanting to be anywhere else. 

“Okay.”

—---------------------------------------------------

“Okay—wow. This is–” Grace said an hour later, overwhelmed by the results of Rocky’s hustle-and-bustle attitude as he’d worked to get things prepared. 

He’d quickly shooed Grace to the screen room and asked Mary to turn on “something sexy” and when that turned out to be a weird amalgamation of animal mating calls and whale song–which begged the question of what had he been getting up to alone in here–Grace quickly shot it down with a very stern “hearing animals getting it on is not going to get me in the mood, Rock” to which Rocky grumbled but agreed and the screens turned to a dim, low and much sexier mood lighting instead before he rushed back out with a reassurance that he would be right back. 

Grace offered multiple times to help him get—whatever it was that Rocky thought they needed for all of this, but Rocky shot him down each time, insisting with a flippant wave of a claw that he should just sit down and relax with a ‘Rocky handle it.’ He had the distinct feeling he was being ‘soft dommed’, or whatever the heck that term was; Grace admittedly didn’t have a lot of expertise in that area of sex and knew he was probably considered incredibly vanilla.

That was all about to change now, though, as Grace took in his surroundings with another small “wow” of shock. 

Within the past hour Rocky had built them an entire nest of sorts in the Don’t-Go-Crazy-Room and brought all possible soft things on the ship, piling them together and building it into a nice and cozy comforting den. He’d also taken the liberty of grabbing a few cups of water and a coma slurry bag along with a hand towel and a change of clothes for Grace. And lastly, but arguably most importantly, one of the biggest containers of medical lubrication Grace thought he’d ever seen. He had no clue where Rocky found it but thanked whatever gods existed above he did since he had a feeling they’d need at least some of it.

“I’m feeling very woo’ed and special right now, Rock.” He murmured with a note of awe, taking it all in and feeling a tug on his heartstrings when Rocky hummed, clearly pleased, before he reached a hand out to place atop Grace’s.

“Good good good. All for Grace and Rocky. First mate important. Rocky wish do more for Grace. Lack tools and equipment this time. Grace and Rocky make do. Grace remove clothing now.” 

“Oh,” Grace jolted at the abrupt demand and change in tone as Rocky sat upright from the previous loaf stance he’d assumed.

When Grace didn’t move and continued to sit staring blankly at Rocky he huffed in annoyance and leaned forward to grab at Grace’s shirt, edging it up and over his head only after Grace lifted his arms in eager compliance. Grace ignored the unexpected swoop in his stomach and the low simmering heat in his lower regions just from the way Rocky took complete control and then was simultaneously amused by the frustrated sounds as Rocky struggled to get his pants off. 

“I got this, hold on—” Grace stood after Rocky edged backwards to give him room and hooked his thumbs under both boxers and his pants to bring them down without much thought and moved to sit down again but was stopped by a hand to his thigh.

“Wait,” Rocky said. Or rather purred again and he was scooting in closer—in a way that felt completely unnecessary considering his hearing capabilities—and crawled towards Grace in a manner that felt outright predatory. Grace swallowed as he watched his friend’s carapace edge so close to his crotch that the tip of his cock was almost poking him. 

Rocky hummed again as he stared, a low rumble that emanated and vibrated attractively over Grace’s skin and he full body shuddered. The surroundings were too soft for his usual echolocation tapping and he made noises every few seconds both in interest and to keep close watch on the body on display before him.

Grace coughed, awkward, shifted from foot to foot under the attention and fought to keep his hands at his sides; he didn't know what to do with them. It’s not as though he were embarrassed by his body, he knew he had an objectively nice looking penis too but he couldn’t say he’s ever had it looked at so…hungrily before—let alone by a being with no eyes.

Grace watched as Rocky cooed and hummed at his thickening cock with interest, so far only observing and not touching but that spell quickly broke when he raised a claw and gently, but firmly, stroked the side of it down the top of the shaft. 

“Oh–” Grace moaned quietly and jerked forward as his cock twitched, which made Rocky chitter delightedly before he eagerly wrapped a small claw around the head and squeezed. 

“Happy happy happy.” Rocky cooed again, giving his cock another squeeze as it continued to thicken under the attention.

Rocky spent a few minutes giving it some more exploratory squeezes before he brought another curious hand into the mix and ran a flat three-fingered palm up and over his lower abdomen. He scratched through the sparse hair under Grace’s navel and chittered excitedly as his abs involuntarily tensed at the accidental ticklish touches. 

Grace realized at some point he’d started panting and felt his cheeks heat while he listened to his breathing grow heavier still as Rocky’s roving hand stroked over his body confidently as it moved downward through his pubic hair and dipped down low under the hand still wrapped around his cock. 

“Careful–” Grace whispered and his body tensed again as he felt Rocky’s small fingers gently cradle his sac in his small palm and roll the heavy balls around slowly. 

He seemed overly intrigued by them as he poked and grabbed and gently pulled at his scrotum, all while the other hand remained dutifully wrapped around his continuously growing erection. Grace was quickly reaching his breaking point of needing more before he passed out. 

Grace swallowed, “Rock—gotta warn you buddy, it—” He broke off with another low groan as Rocky’s hand moved lower on his cock and squeezed before he tilted his carapace up and dropped the second hand that cradled his balls in a clear signal that he was listening. The hand around his cock stopped moving but remained gripped around him firmly. “I’m not uh. Well–” Grace stopped, trying to consider how to say it in a way that an alien with an incomplete knowledge of human idioms or sayings would understand. “---it’s going to grow more. A lot more. I do both what is called ‘showing and growing.’”

Grace swore if Rocky had eyes they would have widened as his carapace tilted back further in shock before moving in closer than before.

“Grace more big question? Grace so so so big now. Grace get bigger question?” He asked and there was a near desperate and excited edge to his trill. 

“Yeah, sorry.” He gasped as he clenched his hands into fists at his sides to keep himself from doing something dumb like pushing Rocky down and ravishing him right then and there. Not an easily done thing when Grace wasn’t even sure how they were going to have sex but the animalistic desire was there regardless.

“No apology. Rocky like.” Rock quickly made jazz hands with two hands while another two stroked at him with a reinvigorated, excited ferocity. 

Grace huffed a small laugh at his infectious eagerness, shaking his head. He was beginning to think his best friend, soon to be bed partner, might be a bit of a size queen. 

As it grew under Rocky’s attention it thickened past the size that Rocky could comfortably encircle with his petite grasp and the pleased noise Rocky emitted when he could no longer wrap his three-clawed fingers around it fully made Grace blush again. 

After several more minutes of continued stroking his cock finally thickened to its ‘final form’ and he knew from an evening of curiosity armed with only a ruler, some lackluster porn, and a horny can-do attitude that he was just shy of ten inches in length and nearly the thickness of a soda can. Sometimes he forgot how large he truly was until he saw it held in someone else’s hands and in this case it was borderline obscene in Rocky’s small grip and they had to work overtime to pull and stroke up and down the full length. 

Rocky stroked him for another few minutes, making all manner of what Grace presumed to be satisfied noises along with it, before the friction of the suited hand on his sensitive flesh got to be too much and he offered to grab some lube to ease the way. 

“No need. Rocky ready now.” The words were clipped, verging on agitated, which was a far cry from the purrs and coos from moments before. 

“Oh! Okay. Uhm—” Grace said and his voice was noticeably unsteady. He was getting thrown off by the constant mood shifts and tonal changes and felt a sense of emotional whiplash by all the switch-ups. 

He watched as Rocky settled towards the middle of the nest pile and laid down in a way that was on his ‘back’ with the underside of his carapace tilted towards Grace. 

“Come Grace, come.” Rocky beckoned over with a claw and if Grace’s ears didn’t deceive him his voice almost sounded strained. 

Grace knelt beside him carefully, worried now, and his erection flagged a little since it was becoming evident Rocky was struggling and he frowned. 

“Rock are you—Are you in pain? What can I do?” He asked in a gentle tone as he laid a hand on a nearby limb. As much as he found himself looking forward to this he quickly reminded himself that first and foremost this was for Rocky’s benefit and while Grace was glad he could be included and could help he should be far less concerned about both getting pleasure from it himself or getting off. 

Rocky didn’t ‘breathe,’ not like humans did, but his vents seemed to be working overtime and if anything his carapace seemed hotter than normal and it was already usually pretty darn hot. 

“Yes,” Rocky replied—wheezed, really—and he made grabby hands at the bottle of lube they’d left a few feet away that Grace quickly reached over to grab and put in Rocky’s palm. “Bad pain but is fine. Wait too long. Rocky error. Regret not ask earlier. Need—-need Grace.”

“Are you still going to be able to talk me through this? I don’t know what I’m doing…” 

He felt bad making Rocky tell him what to do when, at this point, it seemed like even talking was a struggle for him. It’s not like he’d had some alien sex guidebook to look at first and he figured the anatomy he would be working with would be pretty different from what he was used to. 

Grace was fine with trial and error experimentation usually but in situations regarding his best friend’s safety or wellbeing he’d prefer for it to go down as smoothly and efficiently as possible.

Rather than answer Rocky waved around until Grace realized he was reaching for his hand and he grabbed it quickly, let himself be directed towards the underside of Rocky’s carapace which he now noticed was leaking a milky, silvery substance as the seam slowly opened. 

It was a side of Rocky he hadn’t observed this closely before and he also noticed that the mesh of the suit was different here, more thin and practically see-through. It was so finely and intricately woven it almost appeared there was nothing there at all if you squinted. It was clear just by looking at this section of his suit it was crafted with extra time and care and Grace vaguely wondered just how long this had been on Rocky’s mind but quickly waved away the thought to consider later. 

Right now it was go-time.

“This will stretch enough inside of you, right?” Grace asked as he hesitantly reached out a finger and drew it softly alongside the opening seam with something akin to awe in his tone and movements. Rocky’s internal tissue was a faint pink-purpley hue and unbelievably warm and inviting and he carefully allowed the tip of his finger to barely edge inside. 

The gentle touch made Rocky whine and Grace’s flagging erection took an immediate interest as it twitched.

“Yesss—” Rocky almost hissed and used his upper limbs to push his body sharply down against the sole finger gently prodding away at his now fully opened ventral seam. “Stretch stretch stretch. Rocky can accommodate.” 

Now that they were here in this position Grace wasn’t so sure and he was beginning to worry about the sheer size difference and logistics of penetrating Rocky given how small his body was. He had no idea what it would actually feel like once he was in there but given what he knew about the anatomical make up of Eridians he was unsure whether he’d even be able to fully sheath himself inside. 

“Grace see—-should see opening.” Rocky said and his tone was rushed, strained. “Small near center.” 

Grace ran his finger again along the seam as he looked and he caught the opening in question immediately once his finger swiped by it. Under Grace’s petting and touching Rocky had begun to leak more of the milky-silvery liquid in earnest and he watched a drip stream from the opening down his carapace as he gently rolled his fingers around the now protruding tissue. 

This, at least, looked somewhat familiar to him. It was pushed out a few inches from the rest of his seam and he knew it gave way to a much longer tunnel inside (his ovipositor) and the opening itself was hidden between what he could only compare to horizontally situated labia minora. He separated the ‘lips’ with two fingers to visually see the entrance that he would presumably be going in and swallowed hard. 

It looked so, so small in there and he knew it was going to be tight. 

He remembered Rocky telling him he had an ovipositor and an egg sac and that the eggs were distributed through the ovipositor during mating and during cycle periods (like what was happening now) and likely what he would be doing while fucking him would be helping the eggs release from his body which would serve to relieve the pressure Rocky was undoubtedly feeling from the prolonged exposure to a now unusable egg sac. Grace made another mental reminder to ask Rocky how he usually got them out on his own, curious about the masturbation rituals and periods–for lack of a better term–that Eridians underwent.

That was a conversation for a later time however and in the interim as Grace had poked and played with Rocky’s anatomy while lost deep in thought he’d become a whiny leaky mess, begging for Grace to just get inside him already. 

“Grace! Graaaace! Grace tease poor Rocky.” Rocky was practically writhing and with quick muttered apologies Grace grabbed the lube from Rocky’s hand to pump it on himself and slathered it all over his hardened shaft with brisk, efficient movements. He put on way more than was maybe necessary but he had zero expectations for what was going to happen once he got in there and chafing could be a potential later problem.

Grace grabbed his cock with one hand and spread the opening lips of Rocky’s entrance with the other, allowing himself a couple selfish passes with his leaking slit over Rocky’s opening, smearing his pre-cum over the soft and flexible xenonite. His selfish teasing was rewarded when Rocky, momentarily appeased, hummed happily and wriggled while making little noises even as he attempted to thrust down onto Grace’s cock.

 “Slow first—slow.” Rocky urged, his vents were rumbling and he was emitting such a highly intense heat that Grace could feel even through the suit that he wondered if he should be concerned.

“Okay—just tell me if it's too much. Tell me if you need me to stop or something—” Grace said as he slowly began to push in as carefully as he could, words ending on a gasped grunt. 

Grace could barely restrain a Jiminy Christmas of ecstasy as he slowly, so slowly, pushed the head of his cock into the small opening and he moaned alongside Rocky when he felt the bulbous end pop inside fully and he glanced down to see about eight inches of shaft still remaining.

He looked up at Rocky’s carapace, unsure what he was looking for since he didn't even have a face to check on but he just needed reassurance, needed to be told he was doing good and that this was okay because he was feeling overwhelmed and he couldn’t begin to imagine how Rocky was feeling. 

Rocky, for his part, seemed to be doing great and as soon as Grace had pushed inside he’d immediately shivered and whined, thrilled at finally being given what he’d wanted. As he gave Rocky a few more moments to adjust to his size he petted his claws over the parts of Grace he could reach like his stomach and thighs and Grace shuddered, already teetering on the edge of overstimulation. 

“Good good good, Grace. More slow more.” Rocky’s words were rushed and nearly too high in pitch and Grace was suddenly worried that Rocky would lose himself to sensation and forget to regulate his tone to a frequency that Grace could understand. 

Grace complied dutifully, gently pushing more of his aching length into Rocky as slow as he was physically able to. He’d been holding onto his cock as he went, needing the stability to edge himself in since it was so tight he was having difficulties pushing through the barrier. It was hot, tight, way tighter than anything he’d ever experienced. He’d never had the chance to have anal sex so he could only assume this to be the equivalent feeling.

He was stunned by both the obscene tightness and the way in which Rocky’s body somehow stretched to accommodate him as he continued to push inside inch by inch. Rocky was burning hot inside in a way that was nearly overwhelming and bordering on painful, and Grace marveled at how greedily and readily the body beneath him accepted his cock–as if it craved him–and how the unending softness and heat squeezed down around him like it would be loathed to ever let him go.

Grace was in near disbelief that he was allowed to experience such pleasure without suffering any expected consequences. It felt wrong somehow; he couldn’t believe Rocky was allowing this, that he wanted this from him. Grace felt wholly unworthy and the telltale prick of tears in his eyes shocked him. He’d never once had sex so good that it brought him to tears and they’d barely even started. 

He glanced down again to watch as he pushed inside the tight orifice and groaned aloud at the crude imagery he was provided with in what he could only compare to fucking inside a vagina; the protruding lips spread obscenely wide around his shaft, the mercury-like liquid pooling around his cock and dripping in heavy pulses around him in the suit as he moved. He desperately wished he could feel it, taste it, mercury poisoning be damned. Was it even mercury? Grace honestly had no idea and he wasn’t in the right mind to further contemplate, so it was another thought filed away for later. 

The further in he pushed the more Rocky began to shake and vibrate at a low frequency and the more vocal he became. Some of the sounds he released were beyond Grace’s cognition to understand them and fell on his ears as needy wordless moans or whines. He was downright trembling on Grace’s cock and the awareness of just how much Rocky was enjoying himself only served to turn Grace on even more. 

Grace grabbed and held two of Rocky’s closest limbs with both hands to give himself more leverage and he watched as Rocky scrambled to help and used a free hand to clutch hard at the surrounding blankets while he lifted himself higher. The claw that grabbed at the ground in an attempt to help stabilize was already shaking violently and it amused Grace greatly when he realized any complex positions that would require Rocky to hold them both up was a distinct impossibility given how far gone he was.

He pushed in another inch by agonizing inch; he could feel the finish line approaching. “Almost—almost there, Rock,” Grace groaned and his body shuddered with the effort of both holding himself back from just pushing the rest of the way inside and as he tried to keep himself positioned in a way that was proving to be uncomfortable, his back bowed in awkwardly so he could maneuver inside without having to be completely splayed out over Rocky’s body. 

Rocky was nearly unintelligible with his cries and Grace had no idea how he was going to react once they actually started moving. If they started moving—was thrusting a thing with Eridian mating? These were things he should have asked before this started—but as such the thought fell to the wayside as his cockhead was suddenly met with resistance when he still had at minimum two inches left to go.

“Think—I think we’re at full capacity, bud.” Grace said, breathless. His body shook with the effort to hold himself still while a deep, selfish part of him felt bereft at losing the chance of fully being inside his friend even though the rational side knew it was a pipe dream to begin with. 

Due to his size Grace was already used to having to stop mid to maybe a third of the way before being fully in and doing short, abortive thrusts that barely had him inside but still felt good for his partners. Most women he’d slept with had not been big fans of having their cervixes jackhammered and he couldn’t say he blamed them. Just once or twice had he been able to fully immerse himself in the wet heat of a partner and while it was a heavenly experience it had been few and far between in an already sporadic sex life so he’d just gotten used to living without it.

But now, for whatever reason, Grace was desperate for it and he wanted it more than he’d wanted anything in his entire life. Wanted—no, craved to be fully wrapped up inside Rocky; to feel him around himself utterly and completely and let Rocky feel him in turn. It was an insane, near animalistic urge unlike anything he’d ever felt before and shockingly Rocky seemed to feel the same way.

Rocky whined, “No no no. Need Grace full. More. Grace go statement.” He tore his limbs away from Grace’s grasp where they’d been holding onto him for leverage and they wrapped themselves around Grace’s thighs and tried to pull him in closer. 

“Woah, Rocky—wait—” Grace gasped and shuddered as he tried in vain to keep his body from being brutally tugged forward even as Rocky shifted and pulled and made sounds of protest. “You’re literally full, I can’t—there’s no room for me to go!”

“Then make room,” Rocky growled harshly and Grace was so stunned at the near demonic sound of it that he let himself be pulled in closer with a final shove as Rocky’s claws grabbed at the back of Grace’s thighs and moved their bodies flush against one another. 

“Jesus, Rock, fuc–” Grace cut himself off with a dual hiss of pain and pleasure as his back arched obscenely with the aggressive action and his teeth speared into his lower lip as he attempted to not cum on the spot. It took so much work to get them to this point he didn’t think he’d ever be able to live it down if he were a not even one-pump-chump. Truly embarrassing.

He closed his eyes in the interim and silently pleaded that Rocky allowed him a moment to adjust which he seemed to be patiently, graciously giving to him since he also seemed in need of a moment to calm down.

He’d done it. They’d actually done it. Grace was, for lack of a more graceful term, balls deep inside Rocky. He didn’t even know how he was doing it or why Rocky wanted it like this, it felt like something had shifted and moved inside of him with the final push and while he was concerned he was doing irreparable damage to his friend’s insides the friend in question was now close to keening with delight.

Rocky purred, hummed, practically vibrated around Grace’s body and the claws that once restricted and strained now petted and lovingly stroked over the areas of Grace they could reach as he urged Grace on. 

“Yes yes yes good Grace. Good and full of Grace. Rocky happy happy happy. Adrian same. Big so big. Rocky enjoy.” He was mumbling and shaking happily as Grace himself struggled to stay afloat; the desire to now start fucking him in earnest a physical ache as he also attempted to parse what Rocky was saying with the remaining three brain cells he still had left to utilize. 

“Are you saying—” Grace groaned when Rocky’s channel somehow restricted further around his pulsating cock, tightening in a way that felt like it was trying to squeeze the life out of him. “---are you saying Adrian’s this big?” 

“Yes yes yes,” Rocky repeated as he continued to vibrate and constrict and release his body around where Grace was seated deep within him. Grace was beginning to wonder whether this was how Eridians had sex and if it was all the movement he should be expecting. “Rocky so lucky yes. Two large mates. Big big big.”

Wow, okay, so apparently the joke Rocky was a size queen wasn’t as inaccurate as Grace initially thought it to be. Interesting development.

Rocky’s petting returned to pulling and Grace let out a pathetic yelp when Rocky suddenly pulled his body down on top of him which left him awkwardly hovering above his friend with his elbows situated on the soft cushions high above the top of his carapace. 

Grace glanced down between them with a considering hum. 

The height difference was made more severe by the positioning and Grace had to curl his body slightly inwards so he could be a little closer to the top of his carapace. The near insane levels of heat radiating from Rocky’s vents was stifling and he positioned his forearms as close to Rocky’s body as he could on either sid of his carapace. 

Given Rocky was, well, a rock—at least in terms of fragility or lack thereof—Grace let the full weight of his lower body rest on Rocky’s carapace which was something that Rocky apparently loved if the resounding trill was anything to go by and two solid arms wrapped greedily around Grace’s middle to bring him closer. 

The pulsing and vibrating had continued even in the midst of their reorganization of limbs and bodies and while it felt great, Grace knew that if he was going to have any chance of completion he’d need a little more friction and movement on his end. 

“Is it good? Do you feel good?” Grace asked because sweet Jesus he knew he felt incredible but also while marginally worried about the literal rearranging of guts or whatever equivalent he had done in order to fully seat himself inside Rocky. If Adrian was just as big as himself it stood to reason Rocky was used to adjusting himself to accommodate a bigger intrusion but the concept as an actual possibility felt so foreign to him he needed to be sure that Rocky was truly okay.

“Good good so good Grace so good.” Rocky murmured and Grace didn’t think he’d ever heard him so content, so happy and now that he was stuffed full of cock he seemed satiated in a way that Grace also desperately wished he could be too. 

Don’t get him wrong, Grace was glad—real glad that this was working for him because ultimately that’s what mattered. This was for Rocky, it wasn’t for him. If anything he was being used (and that thought made it twitch hard in a way that made Rocky release a little moan) and that was more than okay by him and he should be happy enough to get what he’d gotten already. 

But.

He was only human and to be human is to be unerringly selfish and Grace found himself craving the same level of satisfaction that Rocky appeared to be revelling in. 

Grace figured there was no harm in asking, at least. 

“Rock,” He started, hesitant and he hoped he wasn’t ruining some sort of secret Eridian mating ritual he wasn’t privy to when Rocky ceased his hypnotic vibrating purring and low happy chirps to give Grace his full attention. “Is there any way—I mean. I don’t know how familiar you are with human sex but, usually, we have to. Uhm. Move, a little bit. Thrusting. Do you think I could—?” 

He trailed off, awkward as heck even in the middle of sex and Grace felt his cheeks heat in a way that had nothing to do with being balls deep inside his roommate. 

He’d always had a really difficult time asking for what he wanted and this proved to be no exception. 

Rocky seemed endeared by the question and even more so by its delivery and he cooed while an arm reached up to gently paw at Grace’s face.

“Yes Rocky know. Watch human copulation videos. Grace do whatever. Enjoy all.” 

He sounded, well—he sounded cock drunk, if he had to label it, and also extremely into the idea of thrusting which further reignited Grace’s excitement. Still, the slight trepidation about that kind of movement in a body apparently not built to withstand it remained and he hesitated again. 

“Positive? I really don’t have to. This is more about you and I don’t want to hurt you or for—” 

Rocky’s carapace shook in a very “I’m rolling my eyes at you, you’re so annoying” kind of way and he gave a very pointed hard squeeze of the limbs still wrapped about Grace’s body. 

“Fuck me, Grace.”

Grace didn’t ever think he was going to get used to hearing that word come out of his alien friend but it fulfilled its intended goal and stoked the flames from a dull fire to an outright passionate blaze as he sat up again and kneeled before him. 

He couldn’t help himself and gave Rocky one final look in an attempt to convey “you sure?” and when Rocky merely growled at him in response Grace took that as his final answer and he pulled almost all the way out before immediately thrusting all the way back inside.  

Grace’s shocked moan got lost in the high-pitched wail Rocky released as Grace re-entered him and the sound shook him so badly he stopped and was going to ask if he was okay again which Rocky did not want whatsoever and he hissed and spat and forced him closer, dragging Grace nearly on top of himself as if he were trying to combine them into one.

Grace took the hint and pulled out, thrusted in again, and this time a little harder than before. The sounds from Rocky didn’t stop, if anything they increased—and Grace really hoped they were sounds of extreme mind-melding pleasure because wow were they unlike anything he’d ever heard from him before—but if the way he continued to be held and glued to Rocky’s carapace by unyielding limbs had anything to say about it they definitely were. 

After a few long and deep thrusts all the way in and and out just to ensure it was okay and that Rocky wasn’t going to suddenly freak out or tell him to stop Grace let the rational part of his brain shut down for the first time in a long while and allowed himself to go full id-brain. 

He fucked Rocky in a way he hadn’t been able to fuck anyone in so, so many years—maybe even ever and it was glorious. 

Grace pistoned his hips hard and fast and he knocked into Rocky’s carapace so roughly that he knew he was going to have a bruised groin and hips but it didn’t slow him down, it only spurred him on faster, rougher. He unleashed the primal side of himself for the first time in his life with no holds barred and it was utterly intoxicating, exhilarating; he didn’t know how he’d gone his entire life without getting to experience this before. 

His grip on two of Rocky’s limbs tightened, well past the point of what would be painful for human skin and he roughly pushed them out and away from his carapace to get a better hold and range of motion as he undulated his cock in and out smoothly, thrusting back and forth in a rhythm that his partners always seemed to love. 

Rocky’s body was practically rippling with an onslaught of vibrations and sounds, keening, vocal tones so high-pitched they very nearly surpassed the frequency with which Grace’s hearing could discern them and the ones he could make out were so loud he thought for sure his eardrums would shatter. 

And Grace loved it.

“Graaaacee~” Rocky sang and the cry of his name, the way it sounded so desperate, so broken left Grace feeling unhinged and he fucked into the hot, tight body with greater abandon and with even more powerful thrusts before he dropped Rocky’s limbs without warning so he could reach over and grab a small chair cushion to slide under Rocky’s body, all without ever once pulling out. 

Rocky lifted himself slightly to help when he realized what Grace was trying to do and the positioning left the upper vent side of his carapace resting lower on the ground while the ventral seam side raised up and allowed Grace to sit higher off the ground.

“What—what Grace do—-question?” Rocky asked brokenly and his voice sounded utterly destroyed. 

“You’ll see,” was all Grace replied as he made sure Rocky was positioned as comfortably as possible before he resumed his earlier stance. He folded himself atop the overheated carapace with arms to either side of his body, knees rested firmly on the floor as he raised his own body higher so the next thrusts were literally fucking down into Rocky’s body. The new angle made it so he could push impossibly deeper and Grace moaned every time he hit that back wall of internal resistance and would somehow just keep pushing past it. It was crazy to him how he could just move Rocky’s organs around with his cock to make more space for himself and that it was something Rocky enjoyed.

With the new angle Rocky was immediately pulling and pushing in a way that Grace couldn’t even tell if he was trying to shove him away or drag him somehow impossibly closer and the limbs wrapped firmly around Grace’s backside dug hard and unforgiving into the soft flesh of his buttocks and thighs, squeezed him to the nearest points of pain while the others tore and grabbed at the bedding and cushions that surrounded them, while his vents grumbled and steamed as he gasped for breath. The stutter-stop of songs as Grace fucked him made it sound like he was dying all while somehow interspersed with a low warble-keen that Grace had never, not once heard Rocky make and he kept panting little mantras of “GraceGraceGrace” “HarderGraceHarderGrace” and “Needneedneed” that were driving Grace insane. Each little sound from Rocky made him respond with is own in kind, a weird reciprocal tandem moan-trill-pant-trill over and over until finally Rocky full-on shrieked and the sound was so shrill that Grace winced but still he didn’t stop, refused to stop until Rocky told him to, he had to keep going he was getting soso close—

“Grace–” Rocky gasped suddenly and it sounded different, utterly breathless but urgent and somehow Grace knew that something was happening or maybe even wrong and he didn't know what was happening only that the tone was off and it worried him so he slowed down his near manic levels of thrusting to pull back and looked down at Rocky, at himself, and let out a horrified gasp.

At some point, and he’s guessing it was related to that scream Rocky let out, the egg sac had burst inside him and mixed in with the mercurial wetness that was now so abundant it completely drenched the lower half of Rocky’s suit from where it had squelched and splashed messily with Grace’s thrusts. 

There were hundreds of little eggs surrounding the visible part of Grace’s cock that he’d pulled out and then once he pulled all the way out he watched with interest as a small globule of congealed eggs followed, mixing with more mercury before it dribbled down Rocky’s seam. 

This was one of the strangest and terrifying yet erotic experiences of Grace’s life thus far and he had no idea what he was supposed to do, all he could do was just watch in a mix of arousal and terror as the mercury covered eggs coated the suit and continued to seep out. 

“I’m—uhm—” Grace swallowed hard, so sweaty and dehydrated his tongue stuck to the roof of his mouth while his body was still tense, still on edge and itched for release and he remained in a state of dumb-founded shock perpetuated by his ever present arousal that made him feel even dumber and wished he remembered how to just freaking speak. 

Rocky didn’t seem much better himself and he raised a shaking limb to stroke it down the length of Grace’s forearm in a gentle caress. 

“Is okay. Grace. Go.” He wheezed and tilted his carapace back in a silent beckoning for Grace to re-enter him and continue. As tempting as it was—and Grace was tempted, his cock was immediately ready and raring to go especially when he noticed how used and swollen the protruding parts of his ovipositor looked because of him—he also couldn’t miss the way Rocky’s entire body was shuddering and vibrating and now that Grace had stopped moving he realized his outer shell was hot, way too hot in fact, and was immediately concerned about overheating and hoped that wasn’t issue that Eridians could experience. 

Rocky already seemed so wrecked and yet wanted to continue and the miniscule part of Grace’s brain that was still online felt a low twinge of guilt as he considered that it was probably just for his own benefit.  

“Rock–” Grace tried and he swallowed again, heard the distinct throat click as he essentially swallowed around nothing and that’s when one of Rocky’s front limbs reached out and waved around for something until his claws wrapped around one of the cups of water he’d prepared earlier and shakily brought it closer for Grace to grab. 

Grace nearly moaned at the offering and immediately grabbed it to gulp it down as he petted a hand down Rocky’s closest limb in silent thanks. 

“Thanks.” He finally said aloud once he’d finished and squeezed Rocky’s hand in further acknowledgement as he tossed the cup away and tried to reconcile with the fact he’d literally fucked Rocky’s eggs out of his body.

“We can be done Rock, I’m okay, really. I can just jerk off or something now, this has already been a lot. Plus like, is that normal?” Grace gestured unnecessarily down at the wreckage of Rocky’s suit. “It seems a little not normal, I don’t know. And you’re also tired. I’m totally okay with just sto—”

“Grace stop command.” Rocky said and the tone made Grace’s jaw snap shut immediately. He’d never commanded him before and he couldn’t say he hated it. 

“Not usual no.” Rocky conceded after taking several more seconds of silence to make sure Grace wasn’t going to interrupt or move away. “Mating ritual not much movement. Egg sac intact in mating vacillation. Falls out. During cycle if alone can push out on own. Grace break sac and eggs fall out. No big deal. Can push rest out. Is easy. Sac separate from channel wall. Worst part. Is fine now.” He waved his hand around as he spoke to further emphasize the ‘no big deal-ness’ of it all but Grace remained unconvinced. 

“Okay but, respectfully, if it hasn’t happened like this before, how can we be sure it’s ‘no big deal’? Rock, I don’t want to do something that will mess up your insides for good or god forbid put you in pain, it’s actually one hundred percent fine that—”

“Already pain. No big deal. We figure out rest later. Grace continue.” Rocky said with another flippant wave, like it was nothing, like he didn’t just say that and make Grace stop dead in his tracks.

“What?” The low tone of his voice instantly made Rocky jolt in the way where Grace knew he realized he’d messed up. “What do you mean ‘already pain’? What does that mean?”

It dawned on him that Grace was veering on upset and he wrung two hands together nervously, clicked his claws together with a quiet chirp. 

“Grace too big. Rocky not care. Grace big like Adrian. Adrian not go all inside, refuses. Knows there is pain. I ask and beg. Adrian scared and not do. Want want want. Want Grace. Grace nice and gives.” His tone was intense, almost a cry, ending in a near desperate plea like the words he’d just provided him with would somehow give Grace the capacity to understand and stomach any of it. As if what he’d said would suddenly make any of this okay.

Meanwhile Grace was about to have a goddamn meltdown. 

He immediately clenched his fists at his sides and looked away from Rocky and out towards the doorway as he attempted to control his emotions, not to let them get the better of him and start crying. 

“Rocky,” Grace started and so far he barely succeeded in the not crying department as it came out garbled and messy. “Are you telling me that I’ve been hurting you this entire time?” 

Now Rocky sounded equally as emotional but not sad, no, he sounded frustrated and he stomped a claw into the cushioned floor in protest.

“Yes! Grace not listen! Rocky want! Is good!” He trilled and Grace quickly went from distraught, borderline ready to maybe toss himself out of the airlock, to tilting his head in confusion. 

“You…wanted…pain?” Grace said slowly, blinking. 

“Yes!” Rocky said and his voice was a near shriek. “Enjoy pain! Much much much. Adrian knows and no give. Feels bad, not comfortable doing. Rocky understand. No pressure. Grace know and is comfortable. Rocky happy happy happy.” He ended the impassioned speech with little half-hearted jazz hands.  

“No Grace not know Rock and that’s why I was upset.” Grace replied stiffly but shifted to rub his hands down Rocky’s carapace soothingly to show he no longer was as Rocky shivered happily underneath his palms. “I think maybe I missed something in our anatomy talk but you made this seem kind of normal. Like it was a tight fit maybe sure but that it wasn’t a big deal and not impossible.” 

“Hmm no. Is not normal. Rocky…weird. As Grace say. Is Rocky thing.”

“So what you’re essentially telling me is that you’re just a masochist?” 

“No underst–”

“I’ll explain later.” Grace interrupted with a sigh and ran a hand over his head before thinking better of it, but sadly too late, and he looked down at the lube covered palm in disgust. He did not look forward to getting that out of his hair later. 

They sat in an awkward silence for a moment before Rocky broke it by wriggling and releasing a small sad sounding trill. “Apology. Thought Grace understand. Rocky fault.” 

“It’s fine. I’m just glad you’re okay, I was kinda worried there for a sec.” He replied and smiled a little as Rocky reached out with grabby hands and he let himself be pulled down into a horizontal hug. 

Rocky’s claws immediately combed through Grace’s hair and he closed his eyes with a sigh and felt his lips twitch upward into another small smile. 

Now that he knew Rocky was good and they were fine he felt okay privately admitting to himself he was sad he couldn’t get off but at least figured he had enough jerking-off fodder to last him the rest of his life if this was a one and done deal. 

Grace was now more than content to just cuddle with his friend in the post-non-orgasmic glow for a while before they cleaned up but the thought was interrupted when Rocky gave his hair a small tug. He grunted in response but otherwise gave no inclination of registering it or moving. 

Until Rocky did it again, more insistent, and Grace tried to bat up and away at the grabby nuisance hand with another grunt.

“Rocky what–” He started and then gasped as Rocky pulled even harder on his hair in a way that had him craning his neck back and the only way he could look down to see him was by straining his eyes.

“Grace,” Rocky purred and the hand that gripped his hair pulled tighter still, making Grace swallow hard and his now softened cock twitched with renewed interest where it laid between Rocky and the cushion beneath him. Another claw rose and gently traced over the contours of Grace’s face, down the slope of his nose and around the curve of his lips. “Want Grace back inside. Want Grace to finish.”

Another interested twitch; there was no way Rocky didn’t notice. Grace was so ready to go lie down and have a nice power nap about thirty seconds ago and now he was nearly panting like a dog in heat again from a little hair pulling. Has he always been this easy?

“I dunno…” Grace hedged, almost playing coy and Rocky clocked his crap immediately and made him gasp aloud when another claw reached down to wrap itself around his thickening cock. 

“Grace not want Rocky now question? Grace not want to fertilize eggs question?”

“What?” Grace replied stupidly. 

Even as he spoke his cock instinctively spasmed and Grace groaned loudly as Rocky’s claws began to stroke his erection in earnest, emboldened by Grace’s subsequent interested reaction and disregarding his confusion before he went in for the kill.

“Mm Rocky so empty. Need filled. Need Grace inside.” Rocky’s hand dropped the near painful hold on Grace’s hair and used it to push at Grace’s chest until he sat upright. 

He blinked and looked down at where Rocky laid with a near uncannily perfect come-hither expression that should have been impossible for a being with no eyes. Movement from his periphery caught his attention and he looked down with a surprised jolt when he felt a now lubed up and warm hand return to his cock and spread it around up and down his length. When had he even done that? Just how out of it was he? 

Is getting drunk from alien pussy a concept? If it wasn’t maybe it should be and as if on cue Rocky’s hand moved from his cock to spread his own lips to tease the entrance between and Grace grabbed at his own erection swiftly with a desperate moan. Jesus.

While there was no more active seepage of eggs there was a new steady stream of mercury-like fluid and he could see just well enough inside the passageway as Rocky held himself open that there were still more eggs that needed to come out. 

“Breed me, Grace.” Rocky rumbled in such a low frequency that Grace gave a full body shudder and not just from the words. 

Let it be known that Ryland Grace was just a man. 

Now that he knew just what a freak Rocky was he truly let him have it and shoved inside with one brutal thrust, not giving any time to adjust or prepare. 

The resounding keen that Rocky let out made it worth it, let him know he made the right call, and he fucked him hard and fast as he set an immediate unyielding pace. It had to have been hours at this point, he was nearly blind with lust and his need to satisfy and be satisfied. Rocky made zero protests at the aggression or the near animalistic levels of brutality in Grace’s thrusts and seemed happier than ever, his loud trills echoing loudly throughout the ship. 

He needed to fucking cum.

Grace pounded away at him with a renewed energy and vigor and without care of going too deep and without care of the resistance he met deep inside Rocky’s body. He simply slammed into it, past it, and gave Rocky exactly what he wanted. 

Rocky laid there and let himself be used for Grace’s pleasure and if it weren’t for their weight disparity he’d be getting shoved upwards every time Grace pushed back inside him. Two shaking limbs clutched at Grace hard with claws that dug deep into the skin of his backside and they squeezed and pinched at his ass like it was the only thing keeping him tethered down. Grace knew he was going to be absolutely covered in bruises tomorrow but he couldn’t be bothered to tell Rocky to stop. 

“Graaaaceee—GraceGraceGrace~” Rocky sang and the only sound Grace could make was a grunt in reply but his song pushed him harder, faster.

“Grace so so so good. Grace feels so—” Rocky continued on, singing his praises with utter abandon in between sweet trills and cries as his carapace began to shudder. “Biiiig! Ohhh–” He let out a whine when Grace lowered down again, letting his elbows fall to the floor as he gave himself leverage to pump as quick and hard as his rapidly tiring body would allow. “Fuck me, breed me, fill me GraceGraceGrace~~!”

During Rocky’s near shrieking mantra of his name Rocky’s insides clamped down and vibrated hard around his pulsating cock and Rocky’s entire carapace shuddered and hummed and Grace came so hard and with such ferocity that he was shouting, falling, and he must have blacked out for a few minutes because next thing he knew he'd regained consciousness sprawled next to Rocky who was still struggling, vents stuttering and wheezing.

Grace blinked. 

“Did ya move me ov’r here?” Grace slurred intelligently. He looked around as he tried to recall how he got from being immersed in Rocky’s beautiful, all encompassing heat and having undoubtedly what was the best orgasm of his entire life to where he currently laid.

“Yes.” Rocky gasped out. 

He provided no other explanation immediately which stupidly made Grace feel something akin to pride as he watched with bleary eyes as Rocky tried to regain his bearings and cool off. He figured he’d give him a few more minutes to compose himself since he clearly needed it. 

He also tried not to let himself get re-aroused by the sight of his cooling semen trickling down the panes of xenonite on Rocky’s underside. If he squinted hard enough he could trick his brain into believing it was leaking directly out of his body along with the mercury wetness and small collection of remaining eggs. The visual was way too much for his exhausted body to handle and he quickly looked away and closed his eyes. 

Then it hit him how freaking great he felt, and once he realized it was hard to hold back the extreme onslaught of emotions. 

He laughed, unbidden, and Rocky made a small trill of acknowledgement but otherwise remained silent other than the wheezing.

Grace was smiling; he felt giddy in a way he’d never experienced before after sex. It was an odd free-floating weightlessness that permeated his very being and made him want to rock from side to side, roll around on the blankets and make weird noises. Is this what true post-orgasm euphoria felt like? Did it make everyone this strange, or was it just him?

Grace turned towards Rocky and felt the happy-fond-good feelings increase tenfold. He grinned. 

Rocky had no idea what the heck was going on and that was fair since Grace didn’t have a clue either but when he threw out a hand to him Rocky took only a moment to consider it before he met it with one of his own. Grace squeezed the claws, closed his eyes, and drew in a deep and grateful breath. 

The way it only took him traveling near thirteen light years away from Earth and hooking up with an alien to achieve bliss. Grace couldn’t believe how lucky he’d gotten. 

“Grace pass out.” Rocky added finally once he’d calmed down enough and was able to speak again. “Fall on Rocky. So hot. Worry over heat.” 

Rocky seemed tangentially aware that there was Something Else going on with Grace, some silent moment or epiphany, but chose not to comment on it and Grace felt Rocky squeeze his hand again in another silent acknowledgement. They could talk about it later.

Grace nodded and let them both relax in silence for a time again even as he felt a question that buzzed under his skin and needed to be let out. 

While he felt a gleeful giddiness to his core he knew that Rocky’s answer had the potential to ruin it. He’d just die inside if he’d had a pre-emptive celebration when in reality maybe all Rocky had done was get an ill-timed cramp–an ill-timed cramp that made Grace cum so hard he’d quite literally passed out about it.

Screw it. He had to ask, he had to know:

“You did uh orgasm right? That’s what that was?” 

Rocky rolled partially to his side to give him an Eridian equivalent to a ‘Stank Face’ before he rolled back over–all purely for Grace’s benefit of course–and Grace chuckled.

“I’ll take that as a yes.” Grace hummed. “Awesome.”

He had made an alien orgasm. Dr. Ryland Grace; now Dr. Alien Sex Extraordinaire. 

Rocky let out another gust of air from his vents and it sounded like a pleased sigh. “Rocky like Grace penis a lot. Thank.”

Grace laughed and shook his head while a small smile remained on his lips.

“Yeah, guess it’s not so bad.”