Ianto paused for a moment, sighing happily as Sulu's hand found it's way back around his arousal, before he realized that he had things that he needed to be doing as well. Squeezing lubricant out onto his own hand as well, he quickly capped the bottle and tossed it aside, spreading it over his fingers before reaching around Sulu kneeling there over him to trace the other man's opening, gently, teasing almost, before sliding two fingers in at once. Although Sulu hadn't done this thing too much before, as far as Ianto was aware, that didn't stop Ianto from being certain that he wasn't taking things too fast.

He kept his hand still there letting Sulu adjust for a moment as he took his other hand and wrapped it around Sulu's own arousal, stroking it gently. He'd be lying if he said that he wasn't looking forward to where they were going with this, but Ianto could be patient where patience was needed. When he was certain that the other man was okay with it, though he moved his fingers around slightly, stretching, exploring, and finally finding that one spot inside of him to brush and make the other man see stars for a moment.