Professor Perkins, the biology instructor at a posh suburban girl's junior college, said during class, "Miss Smythe, would you please name the organ of the human body, which under the appropriate conditions, expands to six times its normal size, and define the conditions." Miss Smythe gasped, then said coldly, "Mr. Perkins, I don't think that is a proper question for you to ask me. I can assure you that my parents will hear of this incident!" With that Miss Smythe sat down red-faced. Unperturbed, Professor Perkins called on Miss Johnson and asked the very same question. Miss Johnson, with complete composure, replied, "The pupil of the eye; in dim light." "Correct, Miss Johnson," said Professor Perkins. "And now, Miss Smythe, I have three things to say to you." "One, you have not studied your lesson." "Two, you have a dirty mind." "And three, you will some day be faced with a dreadful disappointment."