[Cemeuncex]

One more thing, as Armi said its latin-america thing, I think its world-wiede thing less or more, in Europe it happens too, its just enough to see people who want to prove this or that, however its easier in Europe, in extreme case you would have a finn and a spaniard or greek and icelander and they still look similar and in many cases could play this game, (or the same would probably happen in Africa between some similar ethnicies or in Asia between Chinese and Korean lets say)
while when you have asian or amerindian visible admixture in an European, it is just like- you may think "do they think I am that stupid" or"are they that stupid", but its probably some emotional thing stronger thatn rational approach.