A comprehensive literature search was conducted for studies dealing with the effects of laughter (spontaneous or simulated) on health, relationships, and overall "robustness." While the abstract is short on details it concludes that laughter confers "different physiological and psychological benefits," has few negative side effects, and few counter-indications (having just had abdominal surgery is one this gentle writer can personally attest to). Since the human body cannot distinguish between spontaneous and simulated laughter (no citation given for this assertion) the researchers suggest that simulated laughter is worth investigating further as a safe therapeutic intervention. So make sure you find reasons to laugh every day and if you can't find reasons just fake it.