That's why

Matthew has entered that torturous verbal stage of asking "Why?" in response to everything.

"Sit in your car seat Matthew."

"Why?"

"So I can strap you in."

"Why?"

"Because we're driving to the swimming pool."

"Why?"

"Because it's too far to walk."

"Why?"

And so on.

Today at the pool, Matthew noticed the lifeguard use her whistle to signal the end of adult swim. "I blow da whistle," he suggested.

"No, you can't blow the whistle," I answered.

"Why?"

"Because you aren't a lifeguard."

"Why?"

At this, I was silent. Where to begin? "Because you can't swim."