well id just like to say my 2 boys use to do it to there mum when they were all playing and it was nothing to do with sorting out whos boss, sasha (there mum) was the BOSS and they knew it, it would be sasha on the bottom then zac in the middle and tye on the top lol, sasha would bite both of them and they would roll over showing there boy bits with legs up in the air while she struted around being boss lol they only did it when they were all playing and it was just about the excitement nothing else.
