Anatomy Class

Sixth grade science teacher Mr. Sampson asks his class; "Who can tell
me which organ of the human body expands to 10
times its usual size when stimulated?"

Nobody raises a hand, so he calls on the first student to look his
way. "Mary, can you tell me?" Mary stands up, blushing furiously.

"Sir, how dare you ask me such a question?" she says. "I'm going to
complain to my parents, who will complain to the
principal, who will have you fired."

Mr. Sampson is shocked by Mary's reaction, but undaunted, he asks the
class the question again. This time Sam raises his hand.

"Yes, Sam," says Mr. Sampson.

"Sir, the correct answer is the iris of the human eye."

"Very good, Sam. Thank you." Mr. Sampson then turns to Mary and says,
"Mary, I have 3 things to say to you. First, it's clear that you have
not done your homework. Second, you have a dirty mind. And third, one
day you are going to be sadly disappointed."