Mainly because to understand something you need to make sense. You do not.
I don't need sense to understand something? Uh, thanks?
alrighty how about this
people dont choose their loveuality
people choose to show their loveuality?
you could totally trick people into thinking your straight
This.
family values isn't nearly as serious as racism. You can't hide being black.
Hell, even religion is FAR harder to hide and get away with than loveuality.
To hide a religion you'd basically have to wipe out every trace of your family, as well as most likley do things you thought your god did not approve of.
To hide say, homoloveuality, all ya gotta do is not get your richard caught in someone's ass.