The Smiths were proud of their family tradition. Their ancestors had come to America on the Mayflower and their descendants included senators and Wall Street wizards.
They decided to compile a family history, a legacy for their children and grandchildren. They hired a fine author. Only one problem arose, how to handle great-uncle George, the criminal, who was executed in the electric chair.
The author said he could handle the story tactfully.
The book appeared. It said, "Great-uncle George occupied a chair of applied electronics at an important government institution, was attached to his position by the strongest of ties, and his death came as a great shock."
At school, Little Johnny's classmate tells him that most adults are hiding at least one dark secret, so it's very easy to blackmail them by saying, "I know the whole truth." Little Johnny decides to go home and try it out.
Johnny's mother greets him at home, and he tells her, "I know the whole truth." His mother quickly hands him $20 and says, "Just don't tell your father." Quite pleased, the boy waits for his father to get home from work, and greets him with, "I know the whole truth." The father promptly hands him $20 and says, "Please don't say a word to your mother."
Very pleased, the boy is on his way to school the next day when he sees the mailman at his front door. The boy greets him by saying, "I know the whole truth." The mailman immediately drops the mail, opens his arms, and says, "Then come give your Daddy a great big hug!"