An old man gave his grandson two coins and asked him to help buy some sauce and vinegar. His grandson then asked which coin is for the sauce and the vinegar? The old man replied: “Any one will do.” The boy took two bowls with him to get the stuff while the grandpa started cooking.

The grandson then asked which bowl is for the sauce and the vinegar? The old man was agitated and started to smack him.

The old man’s son walked over and asked him: “ What are you doing dad?” The old man replied: “This boy is too dense!” Then his son started slapping himself. Astonished by his action, the old man asked him what’s he doing? His son replied: “ You beat my son, so I beat yours.”