Spyke

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science

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Pruney fingers in water aren't caused by skin absorbing water—it's an active nervous system reflex

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The medical paper makes no mention of "improving grip". That conclusion seems to be spurious and almost certainly wrong. The tire tread bit is particularly hilariously dumb. Your fingertips don't need to shed water like a tire ffs.

That theory has been around for ages, much longer than AI. I recall reading it in Readers Digest as a kid. It's also listed in Wikipedia as a probable reason with some studies backing it up.