A compelling physiological explanation for the "beauty stereotype" is being provided by a new study, as to why human beings are wired to favour the beautiful ones.
Studies have shown that humans subconsciously attribute positive social qualities (such as integrity, intelligence, and happiness) to physically attractive individuals.
Even across cultures there exists a significant consensus on relative beauty: youthful facial features, including, for women, relatively large eyes, a relatively high craniofacial ratio, and a relatively small jaw.
Silver foxes (Vulpes vulpes) were selectively bred for "friendly" behavior toward humans.
Within 20 years, a tame line of communicative, trusting, and playful foxes was achieved.
Researchers also noticed that in addition to desirable behavioral traits, the foxes also experienced more rapid development to maturity and displayed more "attractive" and more juvenile physical features, including rounder skulls and flatter faces, with smaller noses and shorter muzzles.
That these neotenic changes resulted from genetically controlled alterations in friendly behavior may suggest that to humans, facial beauty signals an individual's relatively greater level of approachability and sociability.
The study is published in The Quarterly Review of Biology.