A father buys a lie detector robot that’s programmed to slap people when they lie.
He decides to test it out on his son at supper that night.
“Where were you last night,” he asks.
“I was at the library.”
“OK, OK,” the boy says, rubbing his arm. “I was at Jerry’s house.”
“Doing what?” asks the mother.
“Watching a movie. Toy Story.”
“OK, it was porn!” cried the son.
“What! When I was your age I didn’t even know what porn was,” yells the father.
The mother laughs and says, “He certainly is your son!”