Full moon?

A quick flash of Life With Joshua:

I was giving Joshua a bath the other night. He loves bubble baths these days. He was standing in the tub when he gave me what passes for a sly look in a three year old. Then he closed the sliding plastic doors on the tub, looked at me through the semi-opaque door panel with a gleeful grin, exclaimed "Look out! Get ready! Here comes the butt print!"

Then he turned around and pressed his little cheeks against the door, mooning me.

I have no idea where he learned this, but he thought it was the funniest thing ever.