Why does tickling yourself not feel ticklish, but being tickled by someone else does?
In: Biology
You brain is trained to detect changes in your environment. Smells, sounds, things brushing up on you. It was helping us survive for hundred of thousands of years.
Since there is so much going on around you, it tries to filter out or dampen things that are caused by yourself so you can focus on things that might be caused by predators, prey or dangerous things in your environment.
That’s why you don’t hear the blood rushing through your ears, don’t smell your sweaty armpits and don’t feel ticklish if you tickle yourself. It’s your brain filtering out what it considers “noise”.
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