The Theory
Mrs. McGillicuddy volunteered her free time to the local hospital nursery, assisting the nurses with the newborns.
One day, as she was walking through the nursery, she noticed a small pre-mature baby in the incubator. "What's the matter with this wee, little tyke?" she asked.
"Oh, he's the result of an artificial insemination. He'll make it, all right, but he just needs a bit of help."
"Artificial insemination? That just confirms a pet theory of mine: Spare the rod and spoil the child!"