Mrs. Samson asks her class

 Yes, Sam?” says Mrs. Sampson.

“Ma’am, the correct answer is the iris of the human eye.”

“Very good, Sam. Thank you.”

Mrs. Sampson then turns to Mary and says, “Mary, I have 3 things to tell you: first, it’s clear that you have NOT done your homework. Second, you have a DIRTY mind. And third, I fear one day you are going to be sadly disappointed.”