He wanted to show off. Really bad. After all the reading he'd been doing and the books that he'd looked through, he was ready to bring some of those images to life. He'd memorized over a dozen different positions. Even if the spell J'mon had put on him had worn off and he was unable to read the translations, the pictures were more than visual enough. But none of those books could have prepared Bucky for this.
As uncomfortable as the first push was, Bucky was still grinning with Steve only halfway in. "Tighter than you -ah!" He shuts his eyes as his head falls back, Steve greedily pushing the rest of the way. His muscles clench around the intrusion, unfamiliar but adaptable. It hurts but it's a pain Bucky knows he can handle. Because after the pain starts to subside, he knows what comes next. And he wants it so bad right now, he doesn't care if Steve has to rip him apart until he's left raw and red.
Steve cursing as he's fucking him is the cutest thing. Later he'll tease him about it. Right now, he's just trying to thrust himself back onto Steve's cock as hard as he can. Because now he can feel it; that rocky climb to pleasure. He twists his hand with Steve's, holding on hard enough to make his knuckles go white.
He forces his eyes open. Two full breaths and he almost feels like he can last a few more minutes. Maybe only one because now his eyes are on Steve and christ, Steve is too goddamn pretty. Bucky wants to see him really come unglued and even if he's already starting to feel sore, he squeezes his inner muscles hard. A moan pops out over his wet lips as Steve hits a spot inside him that has him arching his back off the bed. "Fuck, there. That! Nng, do that again," he begged.