[He links his fingers together under the table. Maybe he's a little concious of his food choices. Maybe. He just doesn't like anything too rich or unexpected. Which is also why he drags other people out for food so often, if he can take things from their plates he can have a bite to test it without chaining himself to an entire dish.]

A vanilla milkshake, yes.

Oh, you didn't get anything to drink, Yama-chan! You'll have to have some of mine or you'll get thirsty.