Several biological "full papers" discuss the evolutionary role of leg size and function during reproduction in various species:
Research in evolutionary psychology has examined how leg length relative to a person's height (Leg-to-Body Ratio or LBR) serves as a criterion for physical attractiveness. long leg sex
: In contrast, the same study indicated that men were perceived as more attractive when they had a shorter LBR. 2. Biology and Mating Rituals in Nature Biology and Mating Rituals in Nature : Studies
: Studies also explore how sex and leg dominance affect knee and ligament biomechanics during physical activities. long leg sex
: A full study published in Evolution and Human Behavior found that British undergraduates rated women with a longer LBR as more attractive. Longer legs in women are often theorized to be a signal of health and reproductive fitness.