A little farm boy was being led out to the woodshed after pushing the outhouse into the creek with his father still in it. As his father dragged him by the collar he asked, "Dad, did Grandpa spank you when you were a little boy?"
"Yes," his father answered.
"And did Great-Grandpa spank Grandpa when he was a little boy?" he asked.
"Yes."
"Well," the boy said seriously, "don't you think with my help you could overcome this inherited sadism?"