Sixth Grade  Question

The 6th grade science  teacher, Mrs. Parks, asked her class, "Which human body part increases to ten times its size when stimulated?"

No  one answered until little Mary stood up and said, "You should not be asking  sixth-graders a question like that! I'm going to tell my parents, and they will go and  tell the principal, who will then fire you!"

Mrs. Parks ignored her and  asked the question again, "Which body part increases to 10 times its size  when stimulated?"

Little Mary's mouth fell open. Then she  said to those around her, "Boy, is she going to get in big  trouble!"

The teacher continued to ignore her and said to the class,  "Anybody?"

Finally, Billy stood up, looked around nervously, and said,  "The body part that increases 10 times its size when stimulated is the pupil  of the eye."

Mrs. Parks said, "Very good, Billy," then turned to Mary  and continued. "As for you, young lady, I  have three things to  say:

One, you have a dirty mind.

Two,  you didn't read your homework

And three, one day you are going to be  very, very disappointed."