He has to admit, he likes it when Charlie bites hard enough or digs his nails in hard enough to leave a mark. He doesn't want visible evidence of what they've done, of course, but he likes the hidden, tangible evidence quite a bit.

It's the bite, really, that finally pushes him over the edge, too, although he'd been close the whole time Charlie had been inside of him. He's unusually quiet, even for himself, as the orgasm hits him, although from the way all of his muscles tense at once and he shakes slightly, still holding Charlie close to him, there's no denying how intense the flood of pleasure coursing through him is. He doesn't seem liable to loosen his tight grip anytime soon, still completely silent as he trembles beneath Charlie.