Professor’s Joke
A college professor always starts his class with a dirty joke. After one particularly vulgar story, all the women decide to leave the next time he starts telling a joke.
The next day the Professor comes into the class and says, “Did you hear about the shortage of whores in India?”
With that all the women got to their feet and headed toward the door.
“Wait,” cried the Professsor, “the boat doesn’t leave until tomorrow!”