The head of Bucky's cock slips in, and he keeps up the slow push into Clint as the man relaxes around him.

He mouths at Clint's neck and stops moving once he's fully inside, giving Clint a moment to adjust. "You feel fan-fucking-tastic." He murmurs nipping at Clint's earlobe. "Still okay?" He asks, because the last thing he wants to do is hurt the man.