I consider myself to be quite a clean person. So when someone enters my space and brings their interesting hygiene habits into my world, I find it very hard not to cringe. Over on Reddit , people are sharing the hygiene habits they find gross. Let's just say, I feel the need to wash my eyeballs after reading these responses... 1. "I once worked with a DOCTOR who took his contacts out, put them in his mouth to clean them off, and put them back in." — drbd4d "This one made me speechless, I'm genuinely not sure how to process that." — hop2thebus 2. "My sister flosses her teeth with her hair. At the dinner table." — um8medoit "When I was about 19 years old, I finally met my best friend's mom. I'd heard nothing but how amazing she was since I'd known him. She was driving us in her car, and asked if anyone needed to floss; my friend was like 'yeah I need to!' and she pulled out a strand of her hair… he eagerly started flossing his teeth with it. She offered me a strand, and I politely declined..…