According to the StressHealth Magazine:

Research has shown that the health benefits of laughter are far-ranging. While more studies need to be done, studies so far have shown that laughter can help relieve pain, bring greater happiness, and even increase immunity. Unfortunately, however, many people don't get enough laughter in their lives. In fact, one study suggests that healthy children may laugh as much as 400 times per day, but adults tend to laugh only 15 times per day. Other studies find us laughing a little more than that, but if you ask me, virtually all of us could use a little more laughter in our lives, considering how beneficial a good laugh can actually be for our stress levels and overall wellness.

Stress Management Benefits of Laughter:

• Hormones: Laughter reduces the level of stress hormones like cortisol, epinephrine (adrenaline), dopamine and growth hormone. It also increases the level of health-enhancing hormones like endorphins. Laughter increases the number of antibody-producing cells we have working for us, and enhances the effectiveness of T cells. All this means a stronger immune system, as well as fewer physical effects of stress.
  
• Physical Release: Have you ever felt like you "have to laugh or I'll cry"? Have you experienced the cleansed feeling after a good laugh? Laughter provides a physical and emotional release.
  
• Internal Workout: A good belly laugh exercises the diaphragm, contracts the abs and even works out the shoulders, leaving muscles more relaxed afterward. It even provides a good workout for the heart.
  
• Distraction: Laughter brings the focus away from anger, guilt, stress and negative emotions in a more beneficial way than other mere distractions. 

Who wouldn't want to laugh now......