The Benefit Of Laughing Most of people might know that laughing is good for health. Your smile will make everyone smile, and the good mood could be contagious. On the other hand, if you are annoyed, you make everyone irritated. If you are in a bad mood but you behave as if you are in a good mood, It could change your feeling. I have heard that our brains are easily tricked. However, I have never tried it because if somebody see the scene of laughing alone, they could think that I am weird. I am a shy guy.