A person begins to laugh not only from hearing jokes or watching humorous programs Laughter occurs involuntarily when tickled Touching the soles of our feet, ribs, or armpits causes many of us to smile, giggle, and twitch our muscles Such reflex reactions are characteristic not only of humans, but also of animals, such as apes September 17 is celebrated as a funny Tickle Day The initiators of the establishment of this lovely celebration decided to dedicate it to unbridled fun and laughter Tickling evokes positive emotions, increases heart rate and breathing, and releases oxygen into the blood A person who experiences irritation from touching certain parts of the body blushes and at the very beginning experiences pleasant sensations But after a short period of time, the nervous system gets tired of continuous stimulation, which leads to a variety of, including deplorable, reactions of the body to tickling No wonder it was used as torture in Antiquity and the Middle Ages Humanity has gone to extremes at different stages of its development Thus, cute fun in the form of tickling in ancient times was an instrument of torture in Italy, Spain, China and India Laughter arising from the touch of a cat's paw, a brush or a bird's feather on the body led to a reflexive twitching, pain and spasms of the respiratory muscles As a result of torture, the person died from lack of oxygen Against the backdrop of such stories, the sinister meaning of the phrase “tickle to death” takes on a literal meaning Scientists note that children begin to react to touches that irritate the skin from six months of age Although they acquire the skill of laughing by 3-4 months When an adult does not expect tickling, his reaction is much more pronounced The same is observed when touching loved ones, in contrast to the impact on parts of the body of unfamiliar people Aristotle also noted that it is impossible to tickle yourself Reflex reactions to touch are the reaction of the hypothalamus, which is responsible for vigilance and caution The brain of a person who tickles himself realizes that there are no visible threats to him That's why people don't find it funny when they tickle themselves Touching certain parts of the body is part of the playful interaction between parents and child Psychologists also use tickling for correctional and pedagogical support of children with physical or mental development disorders It helps to evoke emotional and motor reactions in cerebral palsy and other pathologies Tickling, according to scientists, is a “good mood generator” built into the body Its task is to awaken the body's internal resources, which force the production of endorphins - hormones of pleasure A short tickling evokes positive emotions in a person, reduces mental arousal and strengthens the immune system Its positive effects on the body have been confirmed by various studies So laugh and be naughty to your health on Tickler Day!