The F-Word in Our House

Johno (4-year-old):  "Mommy, I heard him say the F-word!"
Me (overhearing): "SAY WHAT?!"

Johno: "Mom, who made up the F-word?"
Me: "COME AGAIN???"

Johno: "Why is the F-word bad?"
Me: "WHAT DID HE JUST ASK??"

Amy (to me): "He doesn't mean that.  He means the word for 'toot.'"
Me: Ahhhh....(pheeeww).