"...and you know what they say about curiosity, don't you?"
"Actually, I don't."
"Killed the cat."
"What? You killed a cat??"
"No, curiosity killed the cat. You haven't heard that? Curious, killed the cat. "
"You were talking about curiosity, and I said it killed the cat."
"It's an expression. Curiosity killed the cat, generosity brought him back."
"Oh. Ohh you didn't say that part about generosity. I would have got it if you'd said the part about generous." They started giggling.
"You've never heard that?"
"I was all, who is Curious, and why would he DO that?"