Attraction has always been speculative, but scientists say that popularity is a contributing factor as well. According to a few studies done on how women choose a mate, whether or not a man is in a relationship can make him more attractive. This behavior, known as mate-choice copying, is one that several other species utilize as well. Most people are looking for unproblematic relationships with trustworthy partners, so it seems a bit contradictory to choose someone who has already been chosen. Science argues that mate choice mirroring and other aspects like popularity have very little do to with a man's appearance, but rely heavily on the opinions of other women.