Well, that's why I've offered another example. Did Einstein's parents teach him to be a genius? Or did Stephen Hawking's parents just have the right genes? Is intelligence a 'genetic trait', or is it a 'learned trait'?
And, is it really a question of belief? Have any "gay genes" been found ("lesbian genes", for that matter)? A quick search gives you a lot of contradicting answers.
All of them claim to have scientific proof on their side. Here's the one Trupolitik provided:
Is There a "Gay Gene"?
And here's one with the same title, claiming the opposite:
Is There a "Gay Gene"?
Go figure. As long as there is no conclusive proof, I'm opposed to revealing a sperm donor's sexual orientation. In case scientists might eventually come up with conclusive proof, I might have to rethink my position.
Talking about positions: It's okay that you're not the least bit sexually attracted to the same sex. It really is.