Why do we scratch an itch?

squirrel-scratching-an-itchIsn’t it strange that we want to scratch an itch—and usually do? Just scratching without an itch is a mild source of pain, maybe not greater than that of an inadvertent scratch (thorn, sharp corner of something), which we do register as pain, perhaps more from surprise. But we love to scratch an itch, even [more…]

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