Ianto did know those--that Sulu liked his eyes, his mouth. At least, he thought he remembered hearing the last one at one point. It was hard to be able to concentrate when Sulu was kissing him like that. Ianto's arm was wrapped around the other man, and his other hand was preoccupied holding the wine glass, so he couldn't do much other than kiss him back. He was going to have to finish this wine. He wanted to have his hand free to have the option of touching him more. Running his hand up his thigh. ...grabbing him and dragging him upstairs before things got too intense to want to move again.

Ianto pulled back after a moment, the taste of wine on his lips not only from his own drinking but also from the kiss, and his head spinning from it. "I'm glad," he said, his lips barely a hair's breadth away from the other man's. "Would be rather unfortunate if you didn't. I rather like kissing you, after all..." As if to prove a point, Ianto closed the distance between them, but rather than passionate like they'd been doing before, Ianto gave him the softest, most teasing kiss he could, barely even touching, before pulling back and smirking at him coyly.