5. The Bathroom
Did you forget to put down toilet paper on the seat before using the potty? No need to run out for an HIV test.
Even if a disgusting bodily fluid left on the seat by another person were somehow able to get into your bloodstream (which is virtually impossible as it is -- and, no, "up-splashing" does not put you at risk either), the HIV within that fluid wouldn't survive long enough outside the body to harm you. Not only that, but there wouldn't be enough HIV in that small amount of fluid to pose an infection risk.
Read this Q&A from our archive.
Image credit: Svetlana_Smirnova for iStock via Thinkstock.