Being Gay is NOT a mutation. It has nothing to do with genes whatsoever. And it is NOT brain damage either, and of course, people are not naturally gay. So I don't believe that people are ever born gay. I believe it's a choice, and I also believe gay marriage shouldn't be legal. I like gay people, I have nothing against them and I treat them like everybody else, but that doesn't change that I think what they are doing is wrong.
And since I believe that being gay is unnatural, and probably unhealthy (and according to my personal religious beliefs, it's wrong.) I think it's bad to have gay marriage. Especially if they want to adopt, because then they will influence their child, and maybe even tmake them think it's alright to be gay, or cross-dress, or something else of that nature.
To sum it all up-
We are either made male, or female. Let's keep it that way.