Little Johnny's mother: "Johnny, your teacher mailed me a permission slip so she could offer you the part of a marionette in the school play and I signed it."
Little Johnny: "I know and she offered me the part but I turned it down. You never want to play a part that has that many strings attached."
"Don't be afraid of the dog," said the lady to Little Johnny, who was delivering her groceries.
"You know the old proverb, 'A barking dog never bites?'"
"Yes," replied Little Johnny. "You know the proverb. I know the proverb. But does your dog know the proverb?"