My point was that, if it were genetic, the only way it would be passed on would be for someone to go against the behaviour that the nonexistent gene prescribed. That is, the homosexual gene could only be passed on by engaging in non-homosexual sexual behaviour. So, it would be biologically self defeating.
As for your argument that it isn't about behaviour, but about inclination, if this were true, then people who wanted to steal, for instance, but didn't, should go around calling themselves thieves, since it's not about the behaviour. And people who want to give to their fellow man, but don't, should just call themselves philanthropists. Your argument just doesn't hold water. Besides, people's inclinations change over time, which wo