Aussie gay boy here.
And I agree, I don't think anyone "chooses" to be gay, straight or otherwise, it's just the way it is.
For me, it's the way I was born. Unlike most of my gay friends, I have never had sex with a woman ... and at the tender age of 36 years old I don't it's going to happen anytime soon
Don't get me wrong, (to use a phrase that is commonly used about us) some of my best friends are women