Why Do Babies Love the Booty-Pat?

This one certainly does.

All that patting! Sophie likes it when she's trying to go to sleep, and like a drummer, she can tell when I get off rhythm or when I shift my hand position a little....... The little cutie's got a knack for the beat. I, on the other hand, have some great triceps forming from all the patting. Unfortunately, I also have a great belly-girth forming from using my stomach as a stool for Miss Sophie to sit on. That can't be good for my alignment!