i can't remember if you're comfortable writing nsfw, so sorry if you don't want to, but considering they're mutants and all well over 6'0 - how would bayverse!tmnt react to 5'0-5'5 reader during they're first time? would they specifically have a size kink and how would they adjust?
So usually I'm ify about NSFW because I'm kinda shitty at writing it but I gave this my best shot because I've thought about this too.. sooo I'd love to know y'all's opinions on this ૮₍ •̯́ ₃ •̯̀₎ა
Bayverse TMNT & Size Differences: First Intimacy
Smut!! Please be very aware that this is for 18+! You are consuming this at your own risk! Thank you and enjoy!! 🩷
Leo would be the most controlled, but that control would be hard-won. The first time he sees you undressed—so small, so soft, all those delicate curves and fragile bones—his breath would catch. He'd freeze, katana-callused hands hovering awkwardly at his sides, suddenly terrified of his own strength.
"Do you... are you sure? I could hurt you."
His size kink manifests as a deep, almost reverent protectiveness. He likes that you're small because it makes him feel like a guardian, like something primal inside him can finally unlock—the need to shield, to possess, to be gentle with something so precious. His cock is thick, long, veined dark green against his plastron. When he finally gets it out, he'd look at it, then at you, and let out a shaky laugh. "There's no way that's fitting."
He'd adjust by putting you in control of pace completely. On your back, legs hooked over his shoulders, he'd only push in an inch at a time, watching your face with laser focus. Every whimper or wince would make him freeze, whispering, "Too much? Tell me. I'll stop." He'd use his tongue first—lavish, thorough, until you're dripping and begging—because he needs you desperate enough to take him. When he bottoms out, he'd stay still, letting you clench around him, groaning into your neck, "Fuck... you're so tight. So tiny. This is gonna ruin me for anyone else."
His kink is about worship. The size difference forces him to be deliberate, to earn every inch. And he loves that.
Raph would be all bluster and raw nerves. He'd act cocky—"Heh. Knew you wouldn't be able to handle it"—but his hands would be shaking. The first time he wraps his massive palm around your waist, his thumb nearly touches his middle finger. He'd stare at that, jaw tight, and mutter, "Fuckin' doll."
His size kink is about power exchange. He's always felt like a monster, too big, too angry, too much for the world. But with you, your smallness makes him feel like he can be gentle—if he tries. And that terrifies him, because he's never tried before. His cock is thicker than Leo's, shorter, a brutal curve that throbs against his belly. When you touch it, he'd hiss through his teeth, grabbing your wrist. "Careful. 'S sensitive."
He'd adjust by manhandling you—not roughly, but decisively. He'd pick you up like you weigh nothing, sit you on the edge of the counter, spread your legs with rough, warm palms. "You want it? Gonna have to take it slow, baby. Real slow." He'd slick himself with lube (lots of it), pressing the tip against your entrance and watching your eyes go wide. "Breathe. C'mon. You can take it."
He'd thrust shallowly at first, grunting with each pump, his forehead pressed to yours. "God... fuckin' tiny... feel that? Takin' all of me?" He'd lose himself eventually, gripping your hips hard enough to bruise, but he'd catch himself, forcing his hips still, panting, "Shit—sorry—too much?" The adjustment is constant dialogue, constant check-ins, because he's never wanted to be careful before, and you make him want to be.
Donnie would approach it like research. He'd have read everything—anatomy, positions for size discrepancy, how to relax pelvic floor muscles. He'd be methodical, almost clinical, until you're naked and he sees the real data.
"Oh," he'd breathe, optics whirring as he scans every inch of you. "You're... significantly smaller than my projections accounted for. This is... fascinating."
His size kink is about contrast. He loves the logic of it: your small body, his large one, the physics of how you'd fit together. He'd measure your waist with his hands, muttering calculations under his breath. His cock is long and slender, surprisingly elegant, with a slight upward curve and a prominent ridge underneath. He'd be keenly aware of exactly how deep he can go before he hits your cervix.
"Based on your height and pelvic structure, I estimate I can only safely insert about seventy percent. Beyond that may cause discomfort. We'll need to optimize angle—perhaps a pillow under your hips."
He'd adjust with meticulous care. Multiple pillows, warm lube, slow fingers stretching you open while he explains what he's doing. "I'm stimulating your G-spot now. This should increase lubrication and relaxation." When he enters you, he'd angle his hips precisely, watching your face for any micro-expression of pain. "Too deep? Tell me. I can adjust by 2.3 degrees."
He'd be vocal—not dirty talk, but running commentary. "Your internal temperature is elevated. Heart rate 120 bpm. Pupils dilated. You're enjoying this." He loves the data of your small body struggling to accommodate him. When you finally climax around his cock, he'd freeze, captivated, whispering, "Remarkable. You're clenching at 8 hertz. That's... optimal."
Mikey would be the most enthusiastic and the most accidentally overwhelming. He'd bounce on his heels, shell wiggling, barely containing his excitement. "Oh my god, oh my god, you're so smol! This is gonna be so fun!"
His size kink is about joy. He loves that you're little because it makes everything cuter—your reactions, your sounds, the way you have to look up at him. He'd pick you up and spin you around before remembering this is supposed to be sexy, then set you down with a sheepish grin. "Sorry! Got excited."
His cock is proportional to his build—thick, veiny, with a heavy pair of balls that swing when he moves. He's uncut, the foreskin retracting to reveal a glossy pink head. He's hard before you're even fully undressed, pre-cum dripping. "Whoa. Okay. That's... that's big even for me. You sure you can handle all this?"
He'd adjust with humor and enthusiasm. He'd start with oral, burying his face between your thighs until you're a shaking mess, because he wants you needy for him. When he finally positions himself, he'd line up the head, then pause. "Okay, on three. One... two..." He'd push in halfway on "two," grinning when you gasp. "Tricked ya!"
He'd be vocal and playful. "Look at that—you're takin' it! Knew you could. You're like a little cock sleeve, holy shit." He'd adjust by keeping a fast, shallow rhythm, never fully hilted unless you beg for it. And when you do, he'd groan, "Yeah? You want all of it? This big mutant dick stuffed inside you?" He'd bottom out and freeze, letting you feel the stretch, whispering, "Told ya. We fit perfect."
In my opinion, each of them has a different flavor of size kink, but they all share the same core: reverence for your smallness, and a driving need to make it work—gently, carefully, and with every ounce of attention they can give.
As always thank you for your request!! Also I tried to hope on this quickly so thx for being patient anon!! Love you guys!! 💗
