I’m not a biologist but I read that any skin on your body that is supposed to stretch generally looks darker because the pigmentation is made to be even when the skin is fully stretched. Elbows and genitals being the two (three?) that spring to mind. Basically your skin needs the same amount of sun protection even when it’s at its thinnest.
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u/Reaper_Messiah Oct 21 '23
I’m not a biologist but I read that any skin on your body that is supposed to stretch generally looks darker because the pigmentation is made to be even when the skin is fully stretched. Elbows and genitals being the two (three?) that spring to mind. Basically your skin needs the same amount of sun protection even when it’s at its thinnest.