White people have the greatest ability to convert Vitamin D from low to mid radiation sunlight of all races of the earth (0-4 UV). Vitamin D is a steroid that boosts your brain body skin and bones. Sunlight (which isn't strong enough to burn) on white skin has been proven in multiple studies to increase Testosterone, especially on the torso, upper legs penis and testicles, regions of the body normally completely covered by clothing. Ancient Germanics Celts Scythians Thracians Romans and Greeks often wrestled and exercised naked, at least during Summer. Nudism without obsessing over sex is also proof of and cultivates high impulse control, as we see in the Jains of India (though the rest of their lifestyle is often not very healthy). Many say nudism is degenerate and a good subsection of it is, but being naked in nature is not.