Ianto raised an eyebrow at Sulu cutting his burger down the middle (who did that anyway, he wondered, was it an American thing, or...?) but didn't question it, instead deciding to simply nod and continue eating. It was a sign that he was really enjoying the food, that he didn't pause to talk in the middle of it. His father had (literally, in some cases) beaten table manners into him, so. As a rule, he tried not to talk too much around food if he could help it.