Secrets: What makes you super uncomfortable?!

What just makes you super uncomfortable?? "I have heard my 19 year old son and his girlfriend having unicorn. It's a sound I can never unhear!" "Picking or flossing their teeth at a table in a restaurant while and after they've eaten." "When really old men hit on me, I work at a bar and a nursing home. ??" "My coworker who everyday tells me about her unicorn adventures the night before ugh gross!"