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."

knowledge is power - growing old is mandatory - growing wise is optional    
"Many more men die with prostate cancer than of it. Growing old is
invariably fatal. Prostate cancer is only sometimes so."
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