Penelope, almost six, has a new joke.

“Want to see my treasure?” she asked.

“Sure,” I said.

Then she turned around, pulled down her pants and mooned me.

Right there in the kitchen.

“Get it?” she giggled.

I didn’t. But I was laughing anyway.

“Pirate treasure is called booty,” she explained.

The key to building one’s vocabulary is to put new words to use. After all.