Beauty And The Beast

I'm sitting at an angle of an outdoor cafe downtown where I'm surrounded by people, architecture and glamorous stores but I can't help but question the many facets that make something or someone beautiful. Is there a true aesthetic behind beauty? Is there a predisposed area of our brain that was instilled to filter the ugly from the beautiful or has the evolved vanity mannequin swallowed us whole? The question has a direct correlation with nature vs nurture since so many of us seem to understand what beauty is but can be a world of difference between 2 different people.