A little boy is in his classroom and begins to scratch his crotch.
The teacher asks him what is wrong, and he replies that his crotch is itchy.
The teacher tells the boy to go to the Principal's Office and phone his mother.
Before the teacher knows it the boy returns, sits down, and takes his willy out of his pants for all to see.
The teacher asks "Why are you doing that". The boy replied -"My mother told me that if I could stick it out till noon she'll come and pick me up".