To study the visual aspects of attractiveness, some researchers did a great study on faces, with what they called eigenheads.

Each head was a topograhical computer scan of a person's head, broken down into features. They had fifty heads or so. They asked people to say which one they found most attractive. The researchers also included one head that did not belong to any one person, but was an average of the various features of all the heads on the database.

The averaged eigenhead won. What does this tell us about human nature?