Shaggy dog has an itch—and it just won't go away. Every time he asks one of his friends to scratch his back, they reply that first he must do them a favor. He rounds up Farmer Gertie's sheep, and she scratches his back with her curly hook. Soon his itch is back again. He washes all the dishes in Merv's cafe, and Merv scratches his back. But the itch comes back again. He sweeps up all the fall…