Tickling is one of the ways early humans showed that they liked each other. It’s a form of non verbal communication. Also being ticklish make’s you aware that something is crawling on you.
A tickling victim squirms and strains to withdraw the tickled part in an attempt to get away from attacks on vulnerable areas such as the soles of feet, armpits, belly and flank. If a fly settles on a cow’s belly, the cow ripples her skin muscles as a ticked child squirms, but does not laugh.
Scientists have identified that tickling perception happens in the cerebral cortex, a higher fraction part of the brain. The cerebellium, a primitive part of the brain, dampens the tickle sensation when you tickle yourself telling the cortex to ignore the sensation.
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