Is it normal that my bf is....

I can see how him freaking out when you asked could make you feel like he's hiding being bi. I think he probably got mad for a different reason though. Him asking you to do those sort of things probably took a lot of guts. He obviously trusted and felt close enough to you to ask. You asking him if he's gay could have set off some insecurities he had about the whole anal thing. I read that and didn't think you had a whole lot to worry about. If he was gay he would be more afraid to ask for anal stimuation cause he'd want to keep it a secret. If anything, like you said, he could be bi-curious. If he is, then he's handling it in a healthy manner and indulging in these fantasies with you apposed to a man. Anyone who is bi-sexual and wants to be in a relationship has to choose one gender or the other. You said you would be supportive if he came out that he was gay. So I think you supporting that he'd possibly bi isn't so bad either. He chose you, that's what matters. If you guys are happy aside from you worrying he's gay, then you've got nothing to worry about. I doubt he's gay :P