Speaking completely from the outside and with no personal experience, Bisexuality muddies the water a bit when trying to understand the whole Gay thing.
I have always said bisexual's are just people that can't make a commitment.
Don't get mad at me that's just the heterosexual lack of understanding coming out of me.
I tend to agree with Troy but it doesn't effect me the same as some of you which only furthers proof I have know idea what the hell I am talking about.