In the car, Emma sees a sign for some special classes, and asks, "What's belly dancing?"
Before I could even think up an answer, William pipes up: "It's when you take your shirt off, and you wiggle your belly." I could not.stop.laughing.
I used sarcasm on the kids, and realized that it would backfire, so I tried to gloss over it by just calling it sarcasm. It didn't go over too well.
William: "What's sarcasm?"
Emma: "It's a joke for bigger people."