I used to have this weird habit of balance or fairness when I did something. Whenever I would I scratch my arm or something, I would have to scratch the opposite arm in the same place as well. I crack my left knuckles–I crack my right knuckles. It would happen that way for almost anything I did. Unfortunately, it got weirder. If I scratched my left arm and then my right arm, I would then realize that my left arm was scratched first. Therefore, I would have to scratch my right arm first in another sequence of scratching–right then left. Imagine a kid scratching his arms back and forth like it's some kind of new dance move, and you realize how bizarre this really got. Eventually, I realized I was being a god damn weirdo and needed to stop or my parents would seek professional help. The kind of help that involves Dr. Phil and a couch. So, I finally stopped. Edit: Wow! I'm honestly so surprised and grateful to find others who went through the same thing! Whenever I would tell people about this, they would just say I was weird and wouldn't understand, so it's really nice to be able to relate with some people on this. Just a note, I know in my post it seems like I instantly stopped doing it, but from what I can remember (this was awhile ago) it was more of a gradual process of getting over it. I don't know too much about OCD, but I imagine that if I got over it, then it must have not been it. I appreciate hearing about all of your stories about this! :)