Experts often jokingly reply to questions like yours that there is only one way to get HIV or other STD on a toilet seat: to have sex while on the toilet.

Throughout the last couple hundred years, people have worried about contaminated toilet seats and STDs, but there has never once been a proved or even suspected case. The same is true for sinks, toilets, towels, shared underwear, and anything else you can think of. These infections simply are not transmitted by contact with a contamined environment. Don't worry about it!

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD