I was gonna reply to the one above me but it's so bad it deserves its own post.

I hated pooping. No idea why. Just one day in 3rd grade I apparently decided I was done with it, although I can't remember a conscious decision. So I would hold it in until I couldn't any more and would just end up shitting myself. One day I was trying so hard to hold it in that I ended up peeing myself after school while I was waiting for the bus and thankfully only a few other students saw it and I cried.

Don't remember how it stopped either. Now I poop like a normal person. I'm well adjusted, I swear.