You're one of the rare ones then Benji.
I have to agree, that some want their cake, and to eat it too. My experience with Bi's is thru some of the dating sites out there. I hear those groans. Some of the hits I've gotten are bi's looking for one thing and one thing only, and it's not a relationship.
I mentioned in the S.O. some about an ex of mine. To make a long story short, I was in a two year relationship with a straight man, not gay, not bi. I guess you could say someone in his late teens early twenties, he was still questioning.