Biology Class Question

Mr. Baldwin, the biology teacher called on Mary:

- Can you tell me the part of the body that, under the right conditions, expands to six times it's normal size, and state the conditions.

Mary gasped and said in a huff:

- Why, Mr. Baldwin! That is an inappropriate question and my parents are going tohear of it when I get home!

She sat down, red-faced.

- Susan, can you tell me the answer? - asked Mr. Baldwin.

- The pupil of the eye, under dark conditions - said Susan.

- Correct. Now Mary, I have three things to say to you. First, you have not studied your lesson. Second, you have a dirty mind. And third, boy are you going to be disappointed someday!