Found this on the interwebs:
Check out the rest of the blog post (and the solution) at The Oatmeal
Someone from the comments section on that site made a reference to a Mythbusters episode where they showed that the toilet seat is one of the cleanest surfaces in a bathroom. I think this kind of thinking missing the point. There may only be a few germs there, but if they came from someone else's butt, well that's pretty gross.