"What was that?"
"The piece is missing."
"I'm referring to the word you just used."
"Yes. We can fix that but we never use that word to express how we feel, ok?"
"Little boys don't say that. Only mommies say it?"
"Well, actually. Mommies shouldn't say it either so if you ever hear mommy saying it you can remind me."
"I can say, 'don't say that mommy!'"
"That's right. "