The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Now what's especially important about this accelerator on the desire to mate and mating behavior and hormones is that it is driven by exposure to light, but it is not the exposure of light to the eyes.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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It also emphasizes that sunlight, UVB light, can directly trigger hormone pathways and desire to mate and mating behavior.
Now what's especially important about this accelerator on the desire to mate and mating behavior and hormones is that it is driven by exposure to light, but it is not the exposure of light to the eyes. It turns out that it is the exposure of your skin to particular wavelengths of light that is triggering increases in the hormones, testosterone, and estrogen, leading to increased desire to mate.
UVB light exposure to the skin enhanced female attractiveness, so the perceived attractiveness of females by males, and increased the receptiveness or the desire to mate in both sexes.