Little Johnny In School Hands In A Blank Piece Of Paper.

Little Johnny in school hands in a blank piece of paper for his art homework.

The teacher says,

“What’s this?”

Little Johnny says, “A picture of a cow eating grass.”

The teacher asks, “Where’s the grass?”

The kid says, “The cow ate it all.”

“Ok, then where’s the cow?”

“It left because there was no more grass.”