Mozzart had a fetish for shit, which he extensively exchanged with his cousin. Imagine someone squatting a big chunky shit on your shit each time you hear his music.
Einstein was for lack of better world a whore. He had sex with bunch of his cousin from his maternal and paternal side. He slept with his cousin, her sister and early slept with cousin Elsa's daughter.
Tesla had a fetish for pigeons, thought he could talk with aliens and was afraid of germs more than anything else. And he had OCD to top it all off.