"How old are you, Dad?" Nathan asked me this morning.

"11," I replied, to evoke a reaction.

"No, you're not 11!" he said.

"12?"

"No!"

"How old do you think I am?"

He mused. "16,000?"

I laughed. "Well, pretty close."

"Come on, how old are you really?"

"38," I replied, not trying to evoke a reaction.

"38! Wow, that's really, really, old!" he said. 

I remember when I used to think the same thing.