Jack: "Dad, can this part of your penis fall off?"
(Thank me for sparing the pictures this time)
Dad: "What?!"
Mom: hiding behind book laughing hysterically
Jack: "Is this part of my penis falling off?"
Dad: "I don't know. Ask your Mom."
Jack: "Mom, is this part of my penis falling off?"
Mom: "No, I think it's fine."
Jack: "Is it bad if this part of your penis falls off?"
Dad: "It's bad if any part of your body falls off. Go get in the bath."
Jack: "Ok." (walks away and looks very concerned)
Dad: "Jack, did your brother tell you that?"
Jack: "Yes."