One of my only guy friends is deaf(We always jokingly say that he doesn't count as a guy though, because we treat him the same as if he were a girl
) and while I knew a tiny bit before I met him, I know a whole bunch now. It's super fun, especially when a teacher tells you not to talk, you can still talk to your friends in class.
So yeah, my friends and I are all pretty fluent, with varying degrees of knowledge.