To be attractive, society says your face needs to be symmetrical. However, most real people out there do not have symmetrical faces. Even actors and models have asymmetrical faces. In a series of studies, Nicholas Epley of the University of Chicago and Erin Whitchurch of the University of Virginia found a logical explanation.  In the tests, researchers digitally altered the pictures of the participants and made them look more attractive and less attractive by combining them with a picture of an attractive — or unattractive — person of the same gender. They mixed these doctored...