The reason for tickling is a reaction to the world around us. Already from the cradle the child begins to know its own emotions. As a rule, the external exposure of the skin becoming one of the first sensations of his life. Very often those children who are little tickled in childhood become sullen and withdrawn in itself.Gentle or mild itching is accompanied by pleasant sensations when touched, the skin is covered with "goosebumps". Intense tickling entails loud laughter, squealing, hysterical laughter, etc. This is because the first touch scare people, and then the brain gives the signal about the absence of danger.Studies have shown that samosatene does not give such a result for the reason that the nervous system detects with precision the source of "danger". Thus, in this case, the body simply ignores any action against him.Another reason that people are afraid of tickling, is a huge number of nerve endings that send signals to the brain. The most sensitive areas can be considered as feet, armpits, neck, back, ears, genitals. There is a perception that those people who are afraid of the tickling, quite jealous in a relationship. This hypothesis has no scientific evidence, although seen the relationship between human behavior in relation to his beloved (favorite) and the degree of sensitivity of touch.It is recommended to frequently laugh from the tickling for those who want to lose weight. Of course, the results are not visible, as during active exercise. The average number of daily calories burned from ten minutes of laughter ranges from ten to forty.For a man this kind of stimulation of nerve endings is not only a way of improving mood and sexual arousal, but is also used as punishment. That is, individuals are "sensitive" to torture, which is quite difficult to survive without damage to the psychological state of the person.