Blame His Brother
Some people think the question of whether homosexuality is biologically determined has some bearing on whether it’s ok to discriminate against gays. Legally, there might be something there, but morally and socially, it’s all the same to me. Bigotry is never cool, even if you can twist up some limp rationalization for your hate.
The people that say gay people choose to be gay never identify the mechanism of that choice. They make it sound like there are guys who wake up one day and decide to fall in love with men. They make it seem like lesbians should just learn to love men. It’s a strange viewpoint, and those that hold it describe people so unrealistic that you wonder what kind of person thinks anybody else is wired that way.
Here’s another bit of evidence that homosexuality is all about the nature, not the nurture.