Why is it so normal for girls to be bisexual but when dating a guy who comes out as bi the girl always freaks out about it?

Not all girls like girls but even if they dont it doesnt seem to wierd them out when they get hit on or propositioned. It doesnt change the way they look at the girls who are bi. Being bi for a girl doesnt pose many problems for guys in a relationship as long as nothing is happening behind his back.

Its very different for bi guys. When im dating a girl and i tell her i am bi its like this huge shock and suddenly it changes the entire way they look at me. They get turned off instantly and lose interest everytime. Why is it normal for girls to he bi but not equally normal for a guy to be bi? Why do women have such a hard time accepting a man like that when a guy who dates a girl is usually always cool with it? If a guy is going to cheat on you he can do it with another girl just as easily as with another guy, and doesnt him coming out as bi demonstrate that he can be trusted to be honest with you?