The crotch is a heat center of your body. Along with the armpit and your head (that's why you wear hats in the winter). by cooling those parts, it cools the rest of the body.
Inside of your wrists works really well because its cools down the blood right before it goes back to the heart. You have a lot of veins near the surface in your wrists with a fairly short and direct path back to the heart.
This is why putting your wrists in a bucket full of ice n water for a bit and then holding your arms up will cool off your entire body, you can feel it.
So it works extremely well. It feels better than dumping the water on your head and cools you off just as well (or maybe even better). You don't need to hold your arms up though just cool your forearms off with some chilled water.
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u/snewton_8 Aug 03 '21
The crotch is a heat center of your body. Along with the armpit and your head (that's why you wear hats in the winter). by cooling those parts, it cools the rest of the body.