Day 14 - Honesty - The Best Policy?

A father bought a lie detecting robot built to slap people when they lie.  He decided to test it out at dinner that night.  The father asked his son, Billy, what he did that day.
Billy said, "I did some schoolwork." The robot slapped Billy. 
"Ok, Ok,” Billy said, “I was at Dave's house watching a movie."

 

Dad asked, "What movie did you watch?"

Billy said, "Toy Story 3," and he got slapped again. 
"Ok, Ok,” Billy said again.  “We were watching porn."
"What!?” Dad exclaimed.  “At your age I didn't even know what porn was!"
The robot slapped the father.

 

 

Mom laughed and said, "Well, he is certainly your son."

The robot slapped the mother.
 

P.S. Robot for Sale