Nap time humor

About once or twice a week for the last few weeks, Sam wakes up from his nap missing a sock. I realized a couple weeks ago that a sock wasn't missing but instead two socks had been placed on the same foot. I thought, "that's a funny mistake."

After multiple incidents, I'm thinking it isn't a mistake, so today I said, "Sam, why do you do that?"

He looked right at me and said, "because it is so funny!"

P.S. Today he had 3 socks on the same foot.