Ian has never really liked my belly button much and loves to kick at it as much as possible. He has gotten a bit big to kick it now, so he prefers to get behind it with his bottom and push as hard as he can. John has decided this is a fun game and pushes my belly button back in. John usually gets in trouble because, while I love that he is playing with his son, I am caught in the middle and usually end up hurt (Ian is pretty strong). The whole thing really is cute, and my belly button is completely flat now, so I don't know how it could possibly bother Ian, but he continues with this game.