Little Johnny came home one day and told his dad he had a tough day in math.

"What happened?" asked his dad.

"The teacher got mad at me." Little Johnny grumbled.

"What for?" his dad asked.

"She asked me what 2 x 3 was. I told her 6."

"Well, that's right." Said the dad.

"I know." Said Little Johnny.

"But then she asked me what 3 x 2 was."

"Christ! It's the same fucking thing!" Cried the father.

"I know! That's exactly what I told her," said Little Johnny.