Well, that's something from what Bushidō is for bushi, since there are many who party, drink and sate their desire in teahouses. More like — "Are you some sort of Chinese monk?", blatantly asking without any filter on his side of conversation. As much as he's an easy-going and carefree man, the sass isn't the same as being a tease to the people he knows. Out of place for a bushi like him.

It's only courtesy, Lan Zhan, a way to appreciate a roomate and friend material sharing what he loves most. "Ah! I would like that very much! And don't worry! I have a friend back home who doesn't talk during meals too!"