Scientists have been trying for a long time to find out the cause of the reaction of the human body to tickling. Although there is no definitive explanation as to why people laugh at tickling, scientists agree that tickling is the result of nerve stimulation and brain activation.
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The outermost layer of skin is called the epidermis. The ends of the various nerves are conjoined below this layer of skin. These stimuli activate the two parts of the brain when stimulation is generated there.
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First, by touching the skin, the brain first analyzes it, then the part that controls the feeling of physical satisfaction, that part of the brain also becomes active. In general, parts of the body that do not have bones are more prone to tickling. Such as on the side of the abdomen or below or under the legs. According to scientists, the motivation behind this is human self-defense.
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Because, when someone is tickled, he either bends the body, or wraps himself in such a way that the part of the body that is being tickled shrinks and there is no place to tickle.
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Then why can't you tickle yourself? Scientists have also argued behind this. According to them, no one can surprise himself. The primary condition for feeling startled and tickling someone else's body part or object. If one thinks of tickling a sensitive part of one's body, then one's brain is already aware and controls the relevant part of the body, the speed and timing of tickling.
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Moreover, the brain does not anticipate any danger if it tickles itself, so there is no urge to defend itself. Rather, the skin is slightly irritated when you try to tickle yourself, which can cause a feeling of a little roughness, but because of that you will never laugh and fall to the ground!
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Nice support plz