this post was submitted on 24 Oct 2026
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Common myth: skin wrinkles in water because of osmosis/swelling.

Reality: it is an active, involuntary vasomotor response. The nervous system constricts blood vessels under the skin to form ridges—acting like tire treads to channel away water and improve grip on wet objects. Patients with severed median nerves don't wrinkle at all.

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[–] ExtremeDullard@piefed.social 6 points 2 hours ago (1 children)

I always thought finger skin that's been wet long enough got confused and took itself for clammy scrotum skin.

[–] alywindows3@feddit.org 5 points 2 hours ago (1 children)

Lmao, new evolutionary hypothesis unlocked! Thankfully the actual biology is slightly more dignified than that haha.

[–] ExtremeDullard@piefed.social 2 points 2 hours ago (1 children)

Are you implying that scrotum skin isn't dignified?

With an attitude like that, no wonder it's frowning...

[–] alywindows3@feddit.org 2 points 15 minutes ago

Fair point, my sincere apologies to the scrotum skin community haha.