After reading a relatively recent bio of Salvador Dali, I have to admit that he was more seriously bent than I had thought. Too bad he and Kanonenkoenig Krupp couldn't have gotten together and debated the aromatic qualities of human vs. horse excrement.
Another one who got off on human fecal matter was James Joyce. I could gross you out with what he liked; read a bio of him and find the answer, unless you already know.
There is nothing on earth either so mundane or so disgusting that somewhere, somebody is getting off on it. And chances are the ACLU will fearlessly litigate until we are compelled to validate said behavior.