I have a really flat butt. My boyfriend read that anal sex will help make it bigger, but only if he shoots his sperm deep inside. We used to have anal sex sometimes. He always wore a condom before. Now we have anal sex and he shoots really deep inside me and i keep it there.

I think I like this even if it doesn't make my butt biggerer. He says my butt does look bigger, but I can't tell. Has anyone else heard of thjis? Will his sperms in my butt make it bigger?