I have always found that this argument to be particularly obtuse, disingenuous and racist.
How can one equate the color of your skin with a clearly controlled behavioral activity.
Even if it is true you are born gay, you don't have to engage in it's activity. You make a decision not to have gay sex. You can't make a decision not to be black, unless you are Micheal Jackson.
If I was a black person, I would be completely offended by the idea.
Indeed, and many are.