That Smarts...

It's a hot summer day and Jake and Harry are in a ditch digging away. Meanwhile, Ralph is up under the shade of a tree sipping on a cool drink. Jake asks Harry, "Why are we down here digging in the hot Sun while Ralph is being cool up there?" Harry says, "I don't know, I'll go ask him". 

Harry goes up and asks Ralph, "Why are you up here in the shade drinking a cool drink and Jake and I are in the ditch digging in the hot sun?" Ralph says, "'cause I've got smarts". "What's that? Asks Harry. Ralph puts his hand in front of the tree and says, "Hit my hand as hard as you can". Harry swings his fist at Ralph’s hand, Ralph moves his hand and Harry hits the tree, hurting his hand. Ralph, says "I knew to pull my hand away, that’s called having smarts". 

Harry goes back in the ditch and Jake asks, "What did he say?" Ralph says, "Its cause he has smarts." "What's that? Asks Jake. Harry puts his hand in front of his face and says. "Hit my hand!"