Title: I'd Appreciate Your Input
Rating: NC-17
Pairings: Kirk/McCoy, plot device OC/OC
Word Count: 1,553
Warnings: unbetaed
Summary: For this prompt at buckleup_meme - Hooking his fingers in the pockets of Jim's uniform pants, he pulls until their hips are flush. "As a physician, it would be irresponsible to do otherwise."

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When Ensign th'Zarath appears on a biobed, face a darker blue than usual and antennae drooping downwards, Leonard gets the feeling that he'll be going above and beyond his responsibilities as CMO.

"How can I help you, Ensign?" he addresses the Andorian, whose blush only deepens, further proving Leonard's suspicion that his visit isn't exactly medical.

Tugging at the collar of his red tunic, th'Zarath looks around medbay before making eye contact with Leonard. "I've never been with a human before."

Leonard thinks he's been friends with Jim for far too long since nothing, it seems, can surprise him anymore. This Leonard probably should've seen coming since he's had to hear more than he like to about the crew's personal life since Jim likes to get involved like everyone on the ship is his buddy and, in turn, has to share the information with Leonard.

"Everything's pretty much in the same spot," Leonard responds, forcing himself to keep a straight face as th'Zarath doesn't answer until Chapel's out of earshot.

"The mechanics are the same, yes, but much pleasure is derived from our antennae, which my mate does not have. I was hoping you could provide information on areas humans find sensitive to properly gratify him."

Okay, maybe Leonard can still be surprised. "Look, Keval, it's not like I can draw you a diagram-"

He's cut off by the ensign's antennae perking up and him saying, "That would be very helpful, Doctor, thank you," before Leonard can finish his statement on how different people don't respond the same to each of the erogenous zones.

"I'll send it to you when I'm done," Leonard says with a sigh, trying to ignore how th'Zarath's antennae are quivering as he hops off the biobed and leaves.

Which is how Leonard ends up in his quarters after shift, hunched over a PADD and making notations to give th'Zarath some starting points and an idea on what he'll have to do physically since he won't be able to stimulate telepathically.

And, of course, because his life can't ever be simple, Jim has to show up when Leonard's changing fully out of uniform in the bedroom. Jim, who has no sense of personal space or privacy, has to be snooping through what Leonard's working on.

"What the hell are you doing?" Leonard asks, smirking internally at the way Jim startles and nearly drops the PADD, which he'd been too engrossed in to notice Leonard.

"I could ask you the same thing," Jim replies smoothly. "I think it's against Starfleet regulations to have additional contracts while in active service, and from the looks of it you're revising the Federation-edition Joy of Sex."

Leonard crosses the room quickly to snatch the PADD away despite knowing it won't do any good because a certain damn genius has a photographic memory, but it at least makes him feel better to have it back in his own hands. "You realize that just makes me wonder if you've borrowed it, bought it, or submitted anecdotes of your own."

Jim gives his wouldn't you like to know smirk that has Leonard betting there might actually be a dogeared paper copy under Jim's bed. "Seriously, though, what is that?" At Leonard's raised eyebrow, Jim rolls his eyes. "Okay, I know what it is, but why does it exist?"

"A member of your crew needs it for, uh…" He gestures vaguely with his hand; there's no words coming to mind on how he can put it without breaking doctor-patient confidentiality.

Jim seems to get it, though, as he looks fucking giddy. "Thank God. Masterson's getting high strung, and that's not the mood you want someone working in the armory to be in." Jim stretches slowly, deliberately, before giving Leonard an anything but subtle once over before advancing until their toes are practically touching. "So I guess you're going to want to test out your medical advice first, right?"

Hooking his fingers in the pockets of Jim's uniform pants, he pulls until their hips are flush. "As a physician, it would be irresponsible to do otherwise."

He lets Jim close the distance between them, the kiss unhurried as they chase each other's taste. Jim pulls back with a wry grin that grows even wider when Leonard tries to follow his mouth but is held off with a hand pressed to the middle of his chest.

"It's easiest to start at the top and work your way down," Jim says, and Leonard instantly recognizes his own notes being repeated back to him. Jim removes his hand only to slip it down and under Leonard's shirt, fingers ghosting over his ribs and shoulders before pulling the tee off.

"Be receptive of your partner's reactions, vocal and otherwise," Jim continues, his voice low and gravely. "Some exploration will be necessary to find out which spots are more sensitive than others." Jim punctuates the sentence by sucking a bruise into the skin at the base of Leonard's neck, right above the line of his clavicle. He can't help the moan that escapes when he feels the light graze of Jim's teeth.

"Jim," he gasps when Jim starts kissing up Leonard's neck to refocus on Leonard's mouth, and they walk blindly to the bedroom, Jim cursing into Leonard's mouth when he stubs his toe on the base of the bed. Leonard distracts him from the flare of pain by unzipping Jim's pants and palming his cock through his underwear.

Jim's panting as he wiggles and steps out of his trousers, leaning forward to kiss Leonard quickly before pulling off both of his shirts at once. Jim then pushes Leonard to sit on the edge of the bed and kneels in front of him, still in his socks and underwear, but Leonard still has his sweatpants on, which he'd like to remedy as soon as possible.

He lifts his hips, sliding his pants and boxers down his legs until they pool around his ankles. He's painfully hard already, but with Jim talking the way he is, Leonard would be worried if he wasn't. From the way Jim's cock is straining against his underwear, Leonard can see that Jim's right there with him.

"Manual and oral stimulation typically make up what humans call foreplay," Jim says, forcing his body between Leonard's legs. He kisses and licks his way down Leonard's chest and stomach before nibbling on the jut of his hipbone. Jim then pulls away a little, and Leonard's cock twitches at the feel of Jim's breath just barely brushing over it. Jim takes the base of Leonard's dick in one hand, sticking his tongue out to swirl it around the tip of Leonard's cock before drawing just the head into his mouth, cheeks hollowing as he sucks Leonard in.

Leonard leans back to rest on his elbows and be able to watch Jim by looking down his body. Jim keeps his eyes on Leonard's face the whole time, the cocky bastard. He moves his right hand from gripping the edge of the bed to tangling in Jim's hair, not controlling his movements, just holding on. Jim doesn't take him as deep as Leonard knows he can, seeming content with just playing with the head, and when he starts actually moving the hand that had been holding Leonard's dick, Leonard's eyes squeeze shut at the sensation.

He can feel his orgasm building when Jim pulls away, and Leonard doesn't register the sound he's making until he sees the smug expression on Jim's face. Jim stands at the foot of the bed, removing the rest of his clothes, before climbing up on the bed to straddle Leonard's legs.

"Don't feel like you have to try everything at once," Jim growls, attempting an imitation of Leonard's accent that's so bad it has Leonard laughing. "Or I'll let you recover from your hernias the old-fashioned way."

Leonard intends to protest about the use of a painful injury as dirty talk, but the rant is killed before it can surface when Jim leans over, sliding their cocks together and taking both in hand. He works quickly, pelvis thrusting unconsciously into his own hand and against Leonard's dick, and Leonard reaches his right hand up to hold onto Jim's left forearm, which is resting next to Leonard's head, bracing Jim's weight. Leonard's not sure if Jim's still talking or if it's an attempt to kiss as their lips clumsily brush against each other, but Jim ends up pressing his face into the side of Leonard's neck and licking the salt from his skin.

Leonard comes shouting Jim's name, and he feels Jim's toes curling against the sides of his legs before feeling Jim's orgasm mixing with his own between them.

"That's some damn good medical advice, if I may say so myself," Leonard says when he catches his breath. He can feel Jim's body shaking against his with restrained laughter, and Leonard tilts his head to press a kiss into Jim's hair.

He sends the diagram to th'Zarath after a few more test runs, and it's a week before he runs into Masterson in the rec room, who nods at Leonard with a pleased smile. He doesn't tell Jim about it, but Leonard bets that Jim's definitely noticing how th'Zarath's antennae seem perkier and Masterson is no longer so goddamn twitchy.