Alien!Steve letting out a big, content sigh as they lie together, looking at Eddie with nothing but adoration in his eyes as he says with such blissed out sincerity, "you're a wonderful mate."
A laugh startles out of Eddie, they've been dating a little while now so being called mate after attempting to suck his boyfriend's brain out via his dick is unexpected to say the least. He immediately rolls on top of Steve, grinning down at him, "alright mate," he greets, taking on a British affect, "top shag, love, fancy a brew?" Steve's eyes widen and he looks genuinely mortified as Eddie rapid-fires Britishisms at him.
Eddie is a giggling mess when he finishes, flopping to the side and laughing, entirely oblivious to the fact that Steve is still frozen in horror, quietly ensuring he never says the word "mate" again in case it invokes another Strange Seizure in Eddie.
Steve proceeds to research it and is deeply confused because he can only find information about disrupted speech patterns through strokes and head injuries, not verbal triggers.
When Eddie tries to ask alien!Steve if he can wrap Eddie's dick up in his claspers and jerk him off, Steve is a bit reluctant, there's an instinctual element he worries about, because the whole point of them being prehensile is to encourage an ovipositor to tuck up into him and go to town for him to make viable and carry, you know?
He tries to explain this in an offputting way, he doesn't expect Eddie to start grinning at him and nudging in close like "you're worried you might want me to fill you with eggs, baby? Want me to put my 'ovipositor' in you?" (Reading Steve for filth because fuck yeah he wants his human mate to roleplay breeding with him, and not just because it might mean Eddie is open to taking Steve's ovipositor some day, he's not sure Eddie will take much persuasion for that really Eddie's a little freak)
Eddie looking at his dick like "wish it was a bit more like yours" but Steve is happy to discourage that, taking Eddie in hand and dropping compliments whilst Eddie presses his fingers under the largest petal-like scale across his vent to push inside and coax his claspers out (he does get distracted though, curling his fingers upward into the soft hole and squishing around to see if aliens have g-spots)
Toying with the idea that sucking dick isn't super common for Alien!Steve's species, possibly because of The Teeth, he was guided through eating out by one of the women he'd slept with prior to meeting Eddie, it wasn't so different to the way he'd pushed his tongue past a vent slit on someone like him, and then he had curiously rimmed Eddie when they first slept together.
He was a little concerned when Eddie started murmuring about sucking Steve's dick when they were kissing, it was one thing to curl his claspers together into a vague approximation of a human cock when fucking, it was comfortable and his implant disguised it well, but the lone purpose of the right-hand one is lubrication, he isn't sure how easily he could get away with how much slick he produces, or how constant it is during most stimulation.
His solution is just using the left one.
It works, it feels a bit weird to keep his right clasper tucked away inside, unnatural really, plus he has to do some finagling to appear the same length but he doesn't manage to get it quite as girthy (Eddie never comments on it, possibly doesn't really notice, or the power of the human brain strikes again), it’s an odd experience that Eddie’s mouth is a welcome distraction from.
The first time Eddie sinks down to the root and swallows around him when he’s coming is a lot, dark eyes peering up at him, wet and shining, lips stretched prettily, it takes everything Steve has to not unfurl his clasper and flood deeper down Eddie’s throat.
~
Eddie is very sweet about coaxing Steve into sucking dick, to his knowledge, he's Steve's first male partner, he's definitely the first partner Steve's had that has wanted to put something as soft and delicate as external genitals in Steve's mouth.
He has to awkwardly admit Eddie is the first one to blow him when Eddie starts with "you've had your dick sucked, you know what not to do, surely." Eddie doesn't laugh or tease though, hell he looks a little sad about it before lighting up like "they've all missed out, sucking your dick is great."
After that, it's smooth sailing; gentle encouragement and clear instruction, lots of praise, Steve enjoys all of it. But as much as he loves the noises Eddie makes, the way his hips stutter as he tries not to thrust into Steve's mouth, swallowing Eddie's come, he'd be much happier sinking down on Eddie's cock, burying his nose in thick pubic hair, and keeping him enveloped in his mouth, basking in the subtly mixed scents of skin and sweat and sex, the taste and weight of Eddie on his tongue.
He tells Eddie as much after and is pleased to know it's not an unusual preference to have, and Eddie is beyond happy to have his cock warmed, especially when Steve seems prone to it when he's bored of whatever Eddie's watching on TV ("shlocky action movies and a hot mouth on my dick? score").
It's more common before they start travelling but there's a few times in motels where Eddie will strip down to his boxers and a t-shirt and recline on the bed to watch some crap on the TV, shooting incredibly unsubtle looks Steve's way as he "casually" adjusts himself.
~
I also love the mental image I have that during those first two years, every time they veer towards sex Steve has to go to the bathroom first.
Eddie assumes he's got some superstition based fear of peeing During, but when he knows what Steve is and things are getting a little steamy for the first time, he throws out "what? no bathroom break first?" as a joke and Steve gets to embarrassedly grumble through the explanation that his disguise doesn't add anything when his vent is closed, so he's always had to go and work himself up before taking his pants off.
It ruins the mood in the best way, Eddie is howling laughing at the idea of Steve "Ken Doll" Harrington, Steve is laughing and pleading for Eddie to shut up, slapping away pokey fingers as Eddie tries to find Steve's implant and see for himself.
Things get back on track when Steve pins Eddie down with his body, hands pressing Eddie's wrists into the pillows, Eddie's half-hard dick nudging against the soft ridges of Steve's vent, the slight twitch of flesh teasing Steve's claspers free.
Steve never really thought about going hands-free with Eddie before, it would've been too risky, but it's not a risk now, his claspers extending, slithering across Eddie's cock, easing past his balls and honing in on that tight little muscle. He watches as Eddie's eyes widen, mouth a slack 'o', cheeks turning pink, then Eddie hooks a leg around him to encourage him and shivers as the tapered end of a clasper, wet and warm, manages to wriggle inside and pulse hot slick within him.
Alien!Steve and Eddie going swimming at some private cove where they shouldn't be spotted, so Steve's got his disguise dropped.
He's a little hesitant about going in the ocean so naturally Eddie is teasing him about it.
"What's up? Your little rat feet aren't good for swimming?" Eddie's got his hair tied up and wearing garishly pattered knee length swim shorts, already in the water, splashing around expertly (he's a mess, he swims like he's drowning, but he can get from A to B without issue so he chalks it as a win).
Steve is in shorter shorts, bright red with his tail pulling the back low, he's digging his clawed toes into wet sand and looking anxious, "they're not little rat feet," he huffs, looking down at his feet, "are they?"
"They one hundred percent are, but I love your little rat feet," Eddie offers, wading closer until he can touch ground and stand properly, jogging over waterlogged, he takes Steve's hands in his own, tugging gently to coax Steve closer to the water. "What's wrong?" he asks, voice soft and quiet as he cocks his head and catches Steve's strange gaze, absently thinking about how his pretty iridescent eyes look like they belong in the ocean.
He knows Steve can swim, they've fucked around in enough motel pools to know that, (they've also fucked in a hotel hottub but that was that one time Eddie let Steve book their lodgings and they ended up in a swanky hotel). Steve swims like a professional, he has form and skill, and always seems to enjoy it, so Eddie's not sure what the problem is.
"I... have concerns..." he admits, "I've only been in freshwater and chlorine pools..." he scrunches his nose up, "there's a lot of salt in there..." he points out.
"Salts no good?" he asks, Steve gives a vague gesture, he's never said this before, but they've never been to the sea before,
"It's a lot..." he shrugs,
"Well, baby steps? Test the waters, experiment a little?"
"Baby steps with my little rat feet?" Steve smirks wryly, Eddie laughs and dips in, pressing a kiss to Steve's lips before stepping back, keeping their fingers linked.
Steve follows slowly, and Eddie can't help but glance down at the sand, grinning at the weird footprints Steve leaves as they enter the surf together. They're ankle deep pretty soon, or at least ankle deep for Eddie, and Steve has a soft, curious look on his face as the water laps at their bare feet and he wiggles his toes.
"See? You didn't shrivel up and die the second you touched the salt water!" Eddie teases, kicking water up to splash across Steve's shins,
"Fuck off," Steve laughs, pulling his hands free to shove Eddie. Eddie makes a show of stumbling, twisting and falling further into the water, spreading out and floating face down in the shallows. "Oh shit!" he hears Steve gasp and rush to his side, "Are you okay? I'm sorry!" he touches his hands to Eddie's shoulders, crouching beside him and trying to turn him over. "Eddie!" he pleads as Eddie plants a knee and turns, quickly grabbing Steve and wrestling him into the water with an indignant squawk.
They splash around, sputtering and soon laughing as they end up on their feet deeper in the water, Steve handily trying to dunk Eddie as he fights to stay upright in the waist high water.
"Eddie, you bastard!" Steve grunts, shifting his grip on Eddie, managing to tuck him under an arm in a headlock,
"uncle! uncle!" Eddie slaps his arm, "I yield, Stevie!" he tries when Steve gives him a squeeze of warning, letting out an exaggerated strangled noise to no avail. "Eghhh let me go, please." he whines, twisting and grinning up at Steve in a way he'd initially intended to be sweet and endearing.
"Apologise!" Steve insists, squeezing Eddie under his arm and yelping when Eddie bites the swell of his chest and escapes his grasp, bouncing further into the ocean until he has to tread water.
