The most sad thing in the world is that I don't find fat girls attractive.
Are you sure? There isn't any exceptions you'd make?
No, I don't wish to sacrifice my sexual organs to fat girls.
Others would probably call you a fat shamer and say your opinion is irrelevant. I say you have every right to have body preferences.
I dislike homo sexuals, how do you feel about it?
That's wrong, but something completely different. What you're allowed to feel though is attraction to any body type that you'd like-- some people are into bigger women, and others just aren't. That's life.