Son 1: No, the Joker can’t go in the Christmas Cave.
Son 2: Here, Joker. Vrrrroooom. To the Christmas Cave!
Son 1: NO! The Joker goes in the Bat Cave, not the Christmas Cave. Go put him in the Bat Cave.
Son 2 cries.
Me: The Joker could go in the Christmas Cave if Santa would let him.
Son 1: No. The Joker is a bad guy.
Me: Sure he could. Maybe Santa and Batman team up and feed the bad guys magical candy canes that turn them into helpers. So the Joker can come in now.
Son 1: Santa does not feed the Joker candy canes. The Joker is a bad guy.
Me: Just pretend the Joker is a clown, OK? They’re kind of the same thing with all the creepy face paint. And clowns are kind of like elves and elves are allowed in the Christmas Cave.
Son 1 and Son 2 stare at Mommy.
Me: Um. OK. It was just a suggestion. As you were.