this is very specific, by the way; (PS; I am SO sorry for horrible spelling)

So my boyfriend says things like "oh i would so do *name hot famous person* if given the chance", or sometimes it's "two hot asian chicks" and so on... and it's all very specific "impossible" fantasties. And like, I have those too but i would NEVER cheat on him- but he's made it clear that if his 'impossible' fantasty could come true he WOULD cheat. Even when I ask "oh what, even if we're still dating?" he'll say yes.

And like, I get mad. him saying he would 'do' Gwen Stefani or whatever is fine- but he makes it clear that he would CHEAT on me with her. and he says I am not allowed to get mad because "it will never happen." Just now, he said he would do two hot asians if they asked him too (like in this very specific, 'hot', way), and he got mad because I got mad that he would cheat on me. "it'd never happen" and i ask him "what IF it does?" but he doesnt answer and i get madder. he says im not allowed to be mad and wants me to drop it.. he says i don't understand what "hypothetically" means... But i say i don't care if it's a hypothetical situation, i'm still mad that IF it happened, he'd gladly cheat. Mainly because he HAS cheated on me, it was ages ago, but still. (stop bringing it up, he says)

now... The question is, should I be mad? is he right? should I just drop it?