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!"