— Can anyone tell me which human body part increases to ten times its size when stimulated?
No one answered, so she pointed to a student at random. Little Mary stood up, crossed her arms, and said:
— You should not be asking sixth graders dirty questions like that! I’m going to tell my parents, and they will go and tell the principal, and then he’ll fire you!
Mrs. Parks calmly repeated the question.
— Let’s try that again. Which body part increases to ten times its size when stimulated?
Mary’s mouth fell open.
— You’re gonna get in big trouble!
The teacher turned back to the class.
— Anybody?
Finally, Billy stood up, looked around nervously, and said:
— The body part that increases to ten times its size when stimulated is the pupil of the eye.
Mrs. Parks smiled.
— Very good, Billy.
