The hand in his hair hadn't tightened quite to the point of pain; instead, it felt pretty damned good. Groaning a bit, Sulu's fingertips pressed and kneaded Ianto's thighs as he worked his mouth over Ianto's erection. Even when the other's grip loosened on his hair, it still felt really nice, and the fact that he was getting so much noise from Ianto only made the whole experience hotter.

He knew he was going to have to stop, and probably soon, but that didn't mean that he couldn't keep it up for as long as possible before Ianto either pulled him away or made him want to move on. Catching his breath while breathing through his nose, Sulu took as much of Ianto in his mouth as he could and sucked, licking when he could.