While Sulu had never gotten up to quite as much in his past relationships with men as Ianto probably got up to with Jack (Sulu never really thought about it, because it didn't matter much to him what the two of them did, so long as neither of them broke something), that didn't mean he wasn't at least a little accustomed to the things Ianto wanted him to do.

Licking his lips briefly, Sulu leaned down to kiss Ianto briefly, nodding. "Yeah. I have, don't worry." Not many times, but once or twice - he laughed a little and added, "Even if I hadn't, trust me. Sex education in the Academy is beyond extensive." He was pretty sure he knew ways to sleep with aliens that he wasn't even biologically compatible with - but then again, he tried to block out some of that information. "You just have to tell me which drawer to dig around in."