I was like ten years old when I had to even out things if I stepped on a crack in the pavement. If I brushed by something on one side I had to even it out. If I bumped into something, I'd have to go back and bump the other side evenly.
One day I saw a TV show or a movie where someone was like that and people treated them like they were retarded. So I tried really hard to stop it. Over the next few years, I just got rid of the compulsion. I guess it was weak enough.
Just lucky, I suppose. I still have one terrible one but it doesn't let me talk about it or bad things will happen.