A grandfather went to visit his college-age grandson at the dorm. Grandpa
was astonished to find that his son was living a life of sin and corruption,
as shown by the very high-heeled shoe nailed over the doorway. "In my day,"
grumbled Gramps, "we would hang a horse shoe over the door for luck and then
study late into the night hoping to pass our classes." "But grandpa," replied
the grandson, "that is a whore's shoe ..."