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Crankcase didn't pretend to know anything about organics - though he didn't outright hate them like many other Decepticons did, his personal experience with them had been limited up until this point. Despite this, when he woke up in the early hours of the morning to feel Cons' body curled next to him - sweaty, trembling, and running furnace-hot - he knew that something had to be wrong. In a sudden wave of panic, he attempted to shake his boyfriend awake, "Cons! Cons!" he said, his tone urgent but his voice still hushed and gravelly from the remnants of sleep.
Cons blinked awake, slowly shifting from his position at Crankcase's side, expression warm and loving as he reached up to clasp the metal servo gripping his shoulder with one careful pink hand, "Crank?" he yawned, a strange organic reflex that Crankcase never quite understood the purpose of, but found endearing nonetheless, "What is it?"
"You're burning up." Crankcase said, releasing his grip and running the back of one hand over Cons' cheek. He noted the beads of sweat running over his brow, eyes straining in the dark to look over his face for any signs of discomfort or stress, but was only met with the same warmth he was usually greeted with when they woke up together. Cons' very presence pacified Crankcase, melting away his harsh exterior to show a much gentler person underneath.
Cons hummed, leaning into Crankcase's touch, his face flushing a little, "Mmm, yeah, it's alright. I think I must've gone into heat last night, that's all."
Crankcase blinked, "What?"
"Heat. It's a natural part of a Dire Wraith's reprodu-"
"No, no - I know what heat is. It happens to Cybertronians too, I just..." He pauses, thinking of the right words to say, swallowing thickly and letting his eyes roam down the silhouette of Cons' body, over defined muscles and smooth skin. He leans over and flicks on a lamp, his gaze immediately settling between Cons' legs in the new light. There, he can see that he's a mess - glints of light reflect off of thick, clear fluids that cover his inner thighs, dripping down and staining the berth below. Crankcase grumbles at the thought of having to clean it later, but he can't deny the scorching heat that the sight sends to his codpiece, "Do you uh - want help with that? With your heat, I mean."
"Please," Cons breathes out, his face darkening into a deeper shade of pink as he shifts onto his back and lets his thighs fall open, giving Crankcase room to roll over and settle himself between them. They slot together like perfect puzzle pieces, having done this a million times before under less desperate circumstances. Crankcase sits back on his knees, using the light and new position to truly take in the sight of Cons' body sprawled out underneath him. He's already got his legs flung lazily around his hips, chest heaving, soft skin flushed. His eyes are half-lidded, the slit between his thighs soaking and hot and practically begging to be touched - his desire is evident and Crankcase can't describe how badly he wants him. He knows he's not the most creative person in the world - his naming skills are a testament to that - but it isn't difficult for him to imagine how Cons is feeling. Memories of his own heat spring to mind - the desperation, the desire to be filled, to be stretched, the frenzied, insatiable hunger of it all - he wants to give Cons everything he can take, everything that Crankcase has to offer.
He starts off gently, running his hands from Cons' knees to his inner thighs, pressing soft circles into the skin there with his thumbs. Cons shudders, and Crankcase is reminded of how easily exploitable his organic body is. He's just so sensitive in all the places where Crankcase isn't, and though he'd like to see how riled up he could get him just like this, Crankcase isn't one to tease. Instead, he palms over Cons' slit, pressure indirect for now. Cons grunts, his hips pushing into the touch, already desperate for more. The grogginess of sleep visibly fades from his face and is instead replaced with a look of licentious need, eyes lidded and mouth hanging open slightly, his heat now clouding his mind with lust. Crankcase's touches become more deliberate - pulling and prodding in all the places that he knows drives Cons crazy before sinking a single digit into that tight, wet heat.
Cons' cunt wasn't exactly like a valve - it lacked all the particular censors and nodes and folds along the outside - but Crankcase had long since mapped out all the spots to stroke and prod at to goad Cons into a state of gluttonous arousal. He let out a long, low moan as Crankcase worked in a second digit, curling his fingers upwards to a cluster of nerves that had Cons squirming and gasping for air underneath him.
Typically, neither of them were especially vocal in bed, but Cons in heat was a much different story. Every opportunity for silence was filled with breathy moans and grunts and hitches in his voice. Crankcase was enraptured by it, having never seen Cons in such a state of desperate need before. His spark swelled at the sight of it, heavy and throbbing in his chest. He wanted him so badly, his spike aching with need behind his panel, his entire body running hot as his fans clicked on in an attempt to cool his blazing circuitry. He loved the way Cons' pussy clenched around his fingers when he hit just the right spot, and how it continued to flutter and spasm as he worked his body over. Crankcase imagined the feeling of it around his spike - the act of slowly sinking himself into the hottest, wettest, tightest heat he had ever experienced. Though it wasn't only the physical sensation that Crankcase craved. To be inside of Cons was to be as close to him as possible, to be vulnerable with each other. Before he met him, he would've scoffed at the idea of thinking of sex in such overly poetic terms - but now, to him, right here, right now - describing what they had as a 'union', the act of two bodies becoming one, never felt so right.
Without thinking about it, his interface panel snapped back, allowing his spike to pressurize with a soft hiss. He must've gotten so lost in Cons' body that he forgot to approve the ping to open his array manually - his body taking initiative for him. He loved the way Cons' eyes went wide and his face darkened when he noticed, the heat radiating off of his body tantalizing Crankcase's dick in the same way that charge would. Transfluid beaded at the tip when Cons arched into Crankcase's increasingly relentless touches, moaning and gasping and reaching down with one hand to frantically clutch at Crankcase's forearm. Crankcase could see that he was close, and decided to spread his fingers as wide was they could go inside of him. His cunt made an obscene squelching noise that probably would've been embarrassing if it wasn't Crankcase doing this to him. The extra bit of stretch sent Cons tumbling into his orgasm, moaning a debauched version of Crankcase's name and digging his claws into his arm as all the muscles in his body visibly tensed at once. He was beautiful like this, at the height of absolute pleasure, and it made Crankcase's cock throb knowing that it was him who could make him feel this way. Crankcase didn't have much - he never had - but knowing that Cons was really and truly his was more than enough. He didn't need anything else.
Watching him come down from his orgasm was a sight in and of itself. Crankcase loved the way his body slumped back into the berth, his chest heaving and his jaw hung slightly open, panting. He was spent, relaxed, and he looked at Crankcase so adoringly that it made his spark flip in its casing. He was beautiful.
He was beautiful and he needed more.
Crankcase's fingers alone weren't long or thick enough to really alleviate the symptoms of Cons' heat, he noticed. Sure, the orgasm certainly didn't hurt any, but he could already see Cons getting riled up again. He was still hot, still sweating, still trembling in a way that was most definitely not from aftershocks alone. No, he was trembling with sheer need.
"C-Crank, please," Cons murmured, reaching down with one hand to spread the lips of his cunt, displaying himself to Crankcase, "I need you. Inside."
Crankcase took that as his cue, and repositioned them slightly so that he was looming overtop of him, Cons flat on his back with his legs splayed at either side of Crankcase's body. Like this, Crankcase's cock was tantalizingly close to Cons' entrance, and Cons whined and canted his hips upwards in an attempt to make contact. Crankcase shushed him, "Jesus, relax for a sec."
"Sorry, it's just overwhelming like this. With you on top of me and everything," Cons said, his voice strained and quiet.
"S'okay," Crankcase replied, leaning down to give him a quick peck on the forehead, "Hold still."
Carefully, Crankcase grabbed the base of his cock and aligned himself with Cons' sopping wet cunt. He could feel Cons tense beneath him in anticipation, and he lets out a long, indulgent groan as Crankcase sinks inside, his rigidness slowly unwinding until he's hot, loose, and pliant underneath him. Crankcase lets himself relax when their hips finally touch, just savoring the feeling of Cons stretched tightly over his length. His cooling fans kick up another notch and he can feel condensation begin to bead over his plating.
"Shit, I almost forgot how incredible you feel," Crankcase grates out, starting at the way Cons' pussy clenches on him in response to the praise, "You're so soft…"
Cons is clearly without words - he's simply a mess of need underneath him, silently begging Crankcase to just fuck him with every twitch of his hips. Crankcase steals another quick kiss from him and begins to thrust, slowly, carefully. Though they've done this many times before, Crankcase was always somewhat afraid about hurting Cons' comparatively fragile organic body, and was always sure to be gentle in the first few thrusts. Cons brought his arms - all four of them - to Crankcase's back, digging his claws into his transformation seams and clutching him close. God, Crankcase loved the feeling of being completely enveloped like this - seated deeply inside of his boyfriend, arms wrapped around each other and his legs resting on the small of Crankcase's back, trapping him inside. He thought to savor the moment, to continue his lazy pace, but he could already feel Cons' growing impatient underneath him.
It's nice like this, to have someone that's just so desperate for him. It's nice to be wanted, to be needed, to be desired in a way that Crankcase never has before. And he's glad that Cons trusts him enough to see him like this, to let him do this to him. Crankcase starts thrusting in earnest, pulling back until just the head of his spike is inside of him before pressing back in. Cons twitches and moans at every single movement, and Crankcase can't help but appreciate how responsive he is right now. It strokes his ego a little, seeing how easily he's gotten Cons on his back. But this isn't about him, and he dips his head in to nuzzle and kiss at Cons' neck as he focuses on pounding him into the berth.
There's a hiccup in Crankcase's vents as he bottoms out with every thrust, his engine snarling against Cons' chest. He lets out a soft grunt each time Cons clenches around him, nuzzling further into the crook of his neck and getting lost in his body. Crankcase feels himself getting close, but it's too soon. He doesn't want this to end, not yet.
To buy himself some time, he slows his pace a bit, wriggling his hips a little when he slides all the way back in. Cons whines at the slower pace, clearly frustrated by it, but Crankcase is trying his best to drag this out. Still, Cons doesn't seem to be feeling it, and unhooks his ankles from behind Crankcase's back so they fall to either side of his body.
"W-why are y- ah! Why'd you slow down?" Cons grates out, pushing Crankcase's head up so he can look him in the eyes.
"I'm close. Don't wanna cum yet." Crankcase starts at the sound of his own voice. It's surprisingly low and raspy. He keeps his sentences short, "I want you to cum first."
"I would if you would - nnn - if you would just pick up the pace."
If he was being honest, Crankcase never expected Cons to talk to him like that. Normally he's polite and soft spoken - not the type to demand things. To Crankcase, it shows how overwhelmed and desperate he must be feeling, how badly he wants to cum. Still, it sends a pang of irritation through his circuitry, and Crankcase uses that as motivation rear back and begin fucking him hard, any sense of caution thrown to the wind as Cons finally, finally gets what he wants.
Like this, it doesn't take long before they're both close, it's too good, and like most good things that happen to Crankcase, it's temporary. Cons is unabashedly drooling, completely undone beneath him. His eyes roll back into his head as he's pushed over the edge by a particularly deep thrust, cumming around Crankcase's cock, squeezing and spasming around him, sending shivers of white hot pleasure clear up Crankcase's spinal strut. Crankcase keeps thrusting, drawing out Cons' orgasm and diligently chasing his own release. The feeling of Cons rippling around him has him going crazy, pressure building in the base of his spine until it becomes too much. All of his plating and wires lock up at once, his whole frame shuddering. Charge crackles across his plating as he bottoms out inside of Cons, spilling into him and soaking him from the inside out with hot, sticky transfluid. Without any real place to go, it drips out around Crankcase's cock and onto the berth below.
They stay like that for a moment, Crankcase still inside of Cons, foreheads pressed together. They take the time to just appreciate each other's company while they both try and catch their breath. Slowly, Crankcase pulls out. More fluid follows his cock, and though the wetness has now become irritating instead of arousing, he's too tired to really do anything about that at the moment. He collapses on top of Cons, resting his head on his chest. Clawed hands cup either side of his helm while the other two rub small, gentle circles into his back. Crankcase glances up to see that Cons has his eyes closed. He's the picture of utter satisfaction, relaxed and glowing, and Crankcase can't help but feel proud of himself.
"Cons?" Crankcase whispers.
"Yeah?" Cons opens a cluster of eyes to look down at Crankcase.
There's a pause, "How long does your heat last?"
"Hm, two, maybe three days at most."
Crankcase breathes a sigh of relief. Interfacing is fun, but he doesn't know if he could cope with someone who had a heat that lasted longer than a week. He just doesn't have that kind of motivation or stamina. He nuzzles Cons again and closes his eyes, "You wanna get some more rest before Krok actually starts making me do stuff?"
"Of course." There's a smile in his voice.
"Cons?"
"Yeah?"
"Love you."
"I love you too."