Gamzee cries out, high and warbling, as Dave's teeth finally break his skin. His hands clench and he rocks forward with all his weight, breaking rhythm. It's not quite enough for him to come yet, but he's hovering on the edge, so close he can almost taste it. He whines out Dave's name twice, but then Dave is baring his throat and he can't resist leaning down to bite the scare again.

If his mouth wasn't full he'd be swearing and crying out Dave's name over and over, but only muffled groans escape as his hips jerk forward with each sound of his name.