William : "Mommy I had a bad dream last night."
Me: "I'm sorry to hear that. Can you tell me about your dream?"
William: "No, I can't."
Me: "You don't remember it?"
William: "No, I can't tell you my bad dream because it was rated PG."
Me: "I'm old enough for PG."
William: "But, I'm not so I can't talk about it. I'll tell you when I'm old enough."