She walks to the chalk board and draws a huge penis on the board! She truns to the class and simply asked the class,

“Class, does any one know what that is?”

The class sits silently for a second or two than peter stands from the back! He yells, “I know what that is! It’s a PENIS! I know cause my dad’s got two!”

“The small one he pee’s from, the big one he brushs the babysitters teeth with!”