Travis: Knock knock.
Me: Who's there?
Travis: Coco.*
Me: Coco who?
Travis: Coco's at the door! Hurry!
*For the uninformed, "Coco" is Charlotte, Travis' very favorite aunt... and one of his very favorite people in general. Every time the doorbell rings, he quickly scampers down the stairs shouting, "It's Coco!" in hopes that he'll see her. Apparently, this excitement for Coco's arrival has now made its way into knock-knock jokes.
