A desire to appear attractive is universal; it permeates all cultures and peoples, and stretches from the past to the present. Throughout history, both men and women have gone to great lengths to become more attractive. In all parts of the world, people take many different measures to beautify themselves. Even move, the animal world also exhibits the desire to be attractive. Male birds of paradise, with their brilliant hues, contrast sharply with the females. Male peacocks have stunning tail-feathers that are obviously used to attract female ....