A father buys a lie detector robot that slaps you when you lie

He decides to test it out on his son at supper.

Dad says: “Where were you last night?”

Son says: “I was at the library.”

The robot slaps the son.

Son says “OK, I was at a friend’s house.”

“Doing what?” asked the father.

Son says: “Watching a movie

Toy Story.”

The robot slaps the son.

“OK it was p*rn!” cried the son.

Father yells “What? When I was your age I didn’t know what p*rn was.”

The robot slaps the father.

The mother laughs and says, “He certainly is your son.”

The robot slaps the mother.