The forgetful dog
One day a clerk notices a dog in his shop with a note in its mouth. The note reads, “Please give me sausages.” The clerk then notices there is money in the dog’s mouth. So the clerk takes the money and puts a bag of sausages in the dog’s mouth. The clerk is impressed, and follows the dog. The dog comes to a house and throws himself against the door. His owner opens the door, and yells at him. The clerk runs up and says, “Don’t do that! This dog is a genius.” The owner responds, “He’s not a genius! This is the second time he’s forgotten his key!”