Spontaneous laughter, unrelated to one's own free will, is triggered by different (external) stimuli and positive emotions. Simulated laughter is triggered by oneself at will (self-induced, self-initiated, voluntary), with no specific reason (purposeful, unconditional), and therefore not elicited by humor, fun, other stimuli or positive emotions. And stimulated laughter happens as a result of the physical contact or action (reflex) of certain external stimuli (tickle, hugs, massages, others). Therapeutic value of laughter would concern in particular the first two types, Volume 8 Issue 2-2017 Lifestyle Medicine Network, Spain