Wow Buddy, you're post is really interesting. Yeah, I've heard that most fetishes develop at a young age (I was interested in girl farts from 6-12, then being sexually attracted to it at age 13 and up, because of YouTube.) I do have periods of what I call "Fart Horniness" when I'm watching alot of clips. It lasts for about a day or two for me, usually I'm so into it that I stop doing anything else. So I might have a large prostrate gland. I'm actually in one right now, fapping to the same clip over and over again. It's just that good.
But the fetish doesn't replace sex for me. It adds onto the sex. And there are times when I'm bored with the fetish too.