[vanderreeah]

Not in my experience, but that is anecdotal. If you have evidence beyond the anecdotal I'd be interested to see it, though of course there's no obligation for you to do research work for me.

EDIT: Just to add that your comment's two halves are not logically connected. Even if we do act in this way, it doesn't make it a "critical part of what we are", or if it does, there is no reason that "critical parts" cannot be altered if need be. In the early 19th century most people would have thought that a 10 hour working day was too liberal - an 8 hour working day would have been unthinkable; but that "critical part" of people's way of perceiving society was not set in stone, as it turned out.

[Boothroid]

There are studies that show general agreement on estimations of physical attractiveness, regardless of race and culture. Needless to say these are disparaged by those whose beliefs are challenged by said research, but anyway. There are also studies that indicate that most people end up with partners of a similar level of physical attractiveness all else being equal, which would seem to indicate that a hierarchy does exist, and moreover that each of us has some notion of our personal position in the hierarchy.

Whether this all derives from biology is hard to say - however the alternative is to suggest that we are all somehow indoctrinated to value physical attractiveness and would otherwise be saintlike in ignoring things that suggest genetic unfitness, such as obesity, small stature, disfigurement etc. Look at the animal kingdom - I don't think animals are gauging partners on their ability to tell a funny joke, or having the correct politics. The sex drive is one of our most basic drives. To think it's not still driven by basic prerogatives does not seem reasonable to me.