The Dean of Women at an exclusive girls' school was lecturing her students on sexual morality: "Today we live in very difficult times for young people. In moments of temptation," she said, "ask yourself just one question: Is an hour of pleasure worth a lifetime of shame?"

A young woman rose in the back of the room and said, "Excuse me, but how do you make it last an hour?

 
Mr. White, the biology teacher at a posh suburban girls' school, asked during class: "Miss Smith, would you name the organ in the human body that, under the appropriate conditions, expands to six times its normal size, and define the conditions."

Miss Smith gasped, then said snottily: "Mr. White, I don't think that is a proper question to ask me. I assure you that my parents will hear of this."

With that, she sat down red-faced. Unperturbed, Mr. White called on Miss Jones, and asked the same question. Miss Jones, with complete composure, replied: "The pupil of the eye, in dim light."

"Correct," said Mr. White. "Now, Miss Smith, I have three things to say to you: one, you have not studied your lessons. Two, you have a dirty mind. And three, you will someday be faced with a dreadful disappointment."