Use whatever words you like, but don't mistake orientation for action. If a girl likes boy things or a boy likes girl things it doesn't mean anything about their sexuality. It just means they like that thing.
Sexuality's tricky, and people try really hard to make it simple, at the expense of some really important stuff, like respect for the people in question.
Okay, seriously, I'm done. I know better than to get all political and stuff on the Internet.