A Conversation Between Father and Son

Austin struck up the following conversation with me while lying in bed before bedtime.

Austin: Honey, wanna hear a joke?
Anthony: Sure.
Austin: What did the pineapples say before eating themselves and eating themselves again and then they go to bed?
Anthony: What did they say?
Austin (in a high-pitched three-year-old this-is-the-punch-line voice): We are going to eat ourselves and eat ourselves again and then go to bed.
Anthony: {Laughing to himself}
Austin: Honey, what's the funny part of that joke?
Anthony: {Laughing to himself some more}
Austin: Honey, what's the funny part of that joke?
Anthony: I don't know, you're the one who told it, what's the funny part?
Austin: I don't know... Wanna hear another joke...