Robot

A man buys a new detector robot that slaps people who lie.

He decides to test it at dinner.

Dad    : Son, where were you today during school hours?

Son     : At school.

Plaaakkk… (robot slaps son)

Son     : OK, I went to the movies

Dad    : Which one?

Son     : Toy Story

Plaaakkk… (robot slaps son)

Son     : OK, it was a Porn Star

Dad    : What? When I was your age I didn’t even know what porn it was!!

Plaaakkk… (robot slaps dad)

Mom  : HAHAHA!! After all he’s your son

Plaaakkk… (robot slaps mom)