Yes-- there have been some studies with infants-- and girl infants prefer womens faces, and boy infants prefer mens faces (except for their mothers face)-- and infants seem happier with faces that have colors and shapes they are familiar with-- so white babies tend to prefer white faces, black babies prefer black faces, etc. and its not just color-- with photo filters you can give an asian face (with eyefolds, say) a pale, rosy complexion-- but babies are not fooled.. such trick photos often seem to scare babies-- so it seems its not just color, its general shapes of noses, eyes, lips and earlobes, along with hair and skin color- the whole package!
Babies who parents wore eye glasses where not upset with faces wearing glasses, but prefered faces with out glasses (and any parent can tell you, at an early age, babies learn to pull off your eyeglasses. Babies who's father wore beard, where happier with hairy faces..
So we do have have (or aquire at a very early age) a preference for faces that look like our own --or our primary care givers.
There a natural tendency to want to look at people who look like ourselves-- and we also have a natural tendency towards languages-- but most spoke languages are more complex, and have more complicated rules than "pidgeons" -- something language experts recognize as languages that children "make up" when adults of may different language groups come to gether.
So with culture, languages take on more than the simplest rules that are used to form pidgeons-- and with the language, we can extend our culture to take it past the simple preference we aquire as infants.
So i think Francais Pi is right-- we all have to make an effort to learn to be accepting-- and as parents, or just members of society, we have to make an effort to teach openess and acceptance.. just as we teach advanced rules of grammer-- not just in school, but by our everyday behavior.
