I'm a bit to be asking this but DD has not had similar issues obviously so it's new for me.
DS is 15 months old and has in the last month discovered the pleasuresofthepalm when his nappy is off. Nothing unusual about that I assume but he pulls it reallyfar (up to his naval) and then lets it go - it looks really painful. But he seems to like it. Is this okay? He won't actually damage himself will he?