Darwin explained that such qualities are propagated and enhanced over generations, through “the exertion of choice, the influence of love and jealousy, and the appreciation of the beautiful in sound, color, or form.” Indeed, while natural selection is blind, sexual selection has an eye for beauty – although the nature of beauty is always in the eye of the beholder.
达尔文解释道，这些品质是通过“运用选择、爱慕和嫉妒的影响以及声音、色彩和形状方面的审美”而代际传递并强化的。事实上，虽说自然选择是盲目的，但性选择是追求美的——尽管情人眼里出西施。