Just about everyone has some small act that they think only they perform. These acts might be born out of boredom, like making up songs about butts to sing to your dog. They might come from convenience, like using your extremely dextrous feet to pick stuff up. Or they might come from necessity, like tapping your fingers to the tune of "Sweet Child Of Mine" every time you see a picture of your Dad for some reason. Behaviors like these tend to make people think they're not normal, even though everyone does crap like this. Here's some stories of people realizing their roommates were actually crazy.
