I'm sure there are women that are born gay, just like men. But I'm saying. To START OUT liking the cock and then switching to eating box? That usually comes from women who have HAD IT with men.
Personally speaking, I've been fucked over by women ever since I became interested in 'em, but I never once thought "man it would be so much easier if I just liked guys!". Wait, no, that's not 100% correct. There was military school, but that was more of a convienience thing. Even then though I stuck to masturbating.