More on the Fruit Flies

I thin I don't like the "Aha!" nature of some of these reports. It seems like people just don't think about the situation, but simply rally their position. Let's say there is a gene which makes it less distasteful for some to engage in homosexual acts. Does this mean that they are a homosexual? Or does it mean that special people are faced with a choice?

If the later, then most of us shouldn't be so proud of our heterosexuality, as it was built in. Those who can take pride in it would then be those who have the ability to choose, and choose heterosexuality. As for the others, why then do they choose homosexuality? We're right back where we started, aren't we?