Laughing with friends for around 15 minutes boosts a person’s pain threshold by an average of 10%, an international study has found.
Laughter, scientists have discovered, can do as much good for your body as going for a run. Volunteers who watched 20 minutes of comedies and stand-up routines experienced a dramatic drop in stress hormones, blood pressure and cholesterol. Their appetite was also stimulated just as it is with exercise.
Not only is there real science and psychophysiology, but just the anticipation of the "mirthful laughter" involved in watching your favorite funny movie has some very surprising and significant neuroendocrine/hormone effects.