John was a salesman's delight when it came to any kind of unusual gimmick. His wife Marsha had long ago given up trying to get him to change. One day, John came home with another one of his unusual purchases. It was a robot that John claimed was actually a lie detector. About 5:30 that afternoon,Tommy, their 11 year old son, returned home from school over 2 hours late. 'Where have you been? Why are you so late getting home?', they asked. 'Several of us went to the library to work on an extra credit project' said Tommy. The robot then rolled around the table and slapped Tommy, knocking him completely out of his chair. 'Son, this robot is a lie detector. Now tell us where you really went after school.' 'We went to Bobby's house and watched a movie.' 'What did you watch?' asked Marsha. 'The Ten Commandments,' answered Tommy. The robot went around to Tommy and once again slapped him, knocking him off his chair. With lip quivering, Tommy got up, sat down and said, 'I am sorry I lied. We really watched a tape called 'Sex Queen.'' 'I'm ashamed of you, son,' said John. 'When I was your age, I never lied to my parents.' The robot then rolled around to John and delivered a roundhouse right that nearly knocked him out of his chair. Marsha was bent double laughing, almost in tears. 'Boy, did you ever ask for that one! And you can't be too mad with Tommy. After all, he is your son!' The robot immediately rolled around to Marsha, and slapped her three times.