I fap to fat woman and I am ashamed of it.
Why are you ashamed to fap to fat women? It's totally acceptable if fat woman turns you on.
They are disgusting to other people.
But who cares what other people think? If you find fat people attractive, more power to you. That's perfectly fine and natural.
I think I'm gay and my fetish is Fat Woman.
It doesn't matter what your sexual preference is or your fetish, that's something only you are allowed to choose. Ignore what other people may think of your preferences and be happy with who you are.