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How does scratching a person's back help them go to sleep? And why do most people like it when you scratch their back? Along with bears, etc.
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How does scratching a person's back help them go to sleep?

And why do most people like it when you scratch their back? Along with bears, etc.

User Roberto Caboni
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1 Answer

5 votes
because the veins are joined together
User HasanAboShally
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