1) I think it's the best solution given the circumstances. I don't like it either, but I can't think of another better way to go about this.
2) I'm a researcher too, although I'm on the more molecular/genetic side. From everything I've read concerning the biology of same-sex behavior, the conclusion is there's an inherited component behind it all, we're just not sure what it is. That also doesn't mean the "nurture" doesn't play a role, it means there's play on both sides. It's not a dangerous idea, it's just an attempt at an explanation.