There's nothing new about the observation that laughter is good medicine. It goes back hundreds, even thousands of years when the court jester had the task of entertaining royalty and the heads of state. If he was good at his job and performed well, his rewards would be considerable, and if he put on a lousy performance there was a reasonably good chance that he would lose his head - I mean like REALLY lose his head! Over a period of time, however, these court jesters learned that being humorous did much more than just entertain.