Friede,
Your experience is an interesting and poignant comment regarding the "nature vs. nurture" origins-argument of homosexuality. I've always understood it to be nurture and not in-born.
There are studies--and they are so un-publicized I would say they are repressed--that lesbians (as a population group) have a much higher-than-average rate of sexual abuse in their backgrounds. Doesn't make things right, but it does make things more understandable.