What a drawing.

Little Johnny drew a fly on the class grade book. Miss Baker saw the
fly sitting on the notebook and slammed it with a ruler. The fly didn't
fly away. So she slammed the log once again, again the fly didn't fly
away.
This drove Miss Baker really mad, so she started to pound the log with
the ruler and, as a result, the grade book became a bunch of torn sheets
of paper. With the class laughing, she realized what had happened.

Then Miss Baker called Little Johnny's father to school. "You see what
your son did to our class grade book?" she said.

"That's nothing." replied the father. "Last month, he drew a naked
woman on a fence and for two weeks straight I was pulling splinters out
of my d|cK."