Studies have shown that students have been more willing to take this rice purity test than to take a very private STD test because they felt the purity test results were more of a no judgement zone.
Russians come from a plethora of different people, but Slavs are the most common. Slavs traditionally have light brown or even blond hair, with only a smaller part of them endowed with dark hair from southern ethnicities, like so: Black hair color is actually pretty common, especially the further you go East.
Today, red hair is most commonly found at the northern and western fringes of Europe; it is associated particularly with people in the British Isles (although Victorian era ethnographers consider the Udmurt people of the Volga to be the most red-headed men in the world).