The primary school teacher gives the class a sex education crossword, so that they can get a bit of background for the next day's lesson.
The clue for 4-down is "A part of the male body, begins with a P and ends with an S and is 5 letters long". Little Johnny doesn't know the answer and asks his Mum who in turn tells him to ask his Dad....
...his Dad says "easy, it's a penis". Johnny asks "what is that"? His Dad is all proud and whips down his pants and says "boy, THAT is a penis".
Next day at school Little Mary asks Johnny if he got the answer for 4-down, he replies "easy, its a penis". Of course, Mary asks "what is that"?
So Johnny is very proud and takes Mary around the corner and whips down his pants and says "Mary, THAT is a willie, a penis is about 2 inches SHORTER...."
