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.
The common factoid regarding hair colour says it is black. The most common hair color in the world is black, by a 2:1 ratio. In human examples, the simplest example for hair color involves several alleles; but the most common hair color in humans worldwide, black, is produced by the double-recessive. Common does not necessarily mean dominant!