He wears no pants

Since potty training Jack he seems to have discovered how comfy it is for him to not wear pants. he pretty much wears pants when we go places or when I make him when people come over. This picture is from this morning, after we took Avery to school and went to walmart. He just didn't want to put pants back on after using the bathroom when we got home.
Sometimes he will find the closest pair of pajama pants and at least wear those, but he doesn't voluntarily put jeans back on. He makes us laugh. Good thing it's okay for a 3 year old to run around the house in his undies. Right?