LITTLE JOHNNY . . . ON MATH:

Little Johnny returns from school and says he got an F in arithmetic.
Why? " asks the father?
The teacher asked 'How much is 2x3', I said "6" replies Johnny.
"But that's right!"
but then she asked me 'How much is 3x2?'
"What's the ******* difference? " asks the father.
"That's what I said! "