My gf and i are black and she gets excited whenever we watch that has wite men w/ blk girls. worried!!?

The thing about is that it's just fantasy. If you two are going to watch it together you can't be threatened by her reactions or vice versa. She may have a fantasy about white guys but it's a fantasy and that's ok. I've had girlfriends that have had fantasies about black guys, latin guys, orgies, three ways with two guys but it's nothing to worry about. You're worrying way too much about that. It's you she's with. You're the one that's pleasing her. Not some thoughts in her head.