A father bought a lie detector robot that slaps people when they lie.
He decided to test it at dinner one night. The father asked his son what he did that day. The son said, "I did some schoolwork." The robot slapped the son. The son said, "Ok, ok. I was at a friend's house watching movies." Dad asked, "What movie did you watch?" The son said, "Toy Story." The robot slapped the son. The son said, "Ok, ok. We were watching porn." Dad said,"What? At your age I didn't even know what porn was!" The robot slapped the father.
Mom laughed and said,"Well he certainly is your son!" The robot slapped the mother!
P.S. Robot For Sale
A man is as unhappy as he has convinced himself he is.