Toilet Seat Horrors?

You know all the docs and other health professionals insist that you can't get nothing major from a toilet seat, but I beg to differ. Hello! People's pee-pees and hootananies touch the seats, people don't wash their hands, people masturbate, people leave slime rub. Can someone help me indentify diseases you can get whether it be ual or non from toilet seats? Does anyone have a story on things like this. I think it should be a law to have sanitary sprays and seat covers. Who's with me?! :)