We've all heard that beauty is in the eye of the beholder, but is this adage true? How accurately do romantic partners gauge each other's attractiveness? What personality traits do others find most attractive, and how can we use this information to have meaningful relationships with our friends and family? Simine Vazire, associate professor of pyschology at Washington University in St. Louis, discusses the costs and benefits of exaggerating our own and our partners' attractiveness and explains how a little self-knowledge can go a long way.