Nail Clippings
Living with another person is the best way to understand how disgusting others can be. Everybody takes hygiene for granted but the reality is that some people don’t care. They may leave traces of themselves around the house and cause others to vomit.

This Redditor had a disgusting story about his experience because his nemesis left a horrible legacy behind. He wrote: “My old roommate moved out and left his dresser. The drawers were lined with toenail clippings. Still haven’t figured that one out.”