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Fisherian runaway: Difference between revisions
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=== Looks === | === Looks === | ||
Feedback loops in sexual selection like Fisherian runaway may have played a role in the evolution of beauty in some animals, but unlikely in case of facial attractiveness in humans as there is no positive link with lifetime [[reproductive success]] in a variety of cultures.<ref>https://doi.org/10.1016/j.evolhumbehav.2012.01.002</ref> | Feedback loops in sexual selection like Fisherian runaway may have played a role in the evolution of looks and beauty in some animals, but unlikely in case of facial attractiveness in humans as there is no positive link with lifetime [[reproductive success]] in a variety of cultures.<ref>https://doi.org/10.1016/j.evolhumbehav.2012.01.002</ref> | ||
Even though human females are more choosy in accordance to [[Bateman's principle]], it is women who seem to be more ornamented with their [[Boobs|swollen breasts]]<ref>https://doi.org/10.1016/j.evolhumbehav.2010.02.005</ref> and hour-glass shaped body that men strongly desire, but which serve no known biological purpose. Besides an outcome of sexual selection, the importance people put on looks in mate choice could be merely a spandrel of a general preference for aesthetics, or it could be driven by a link between good looks and overall [[good genes hypothesis|good and healthy genes]]. | Even though human females are more choosy in accordance to [[Bateman's principle]], it is women who seem to be more ornamented with their [[Boobs|swollen breasts]]<ref>https://doi.org/10.1016/j.evolhumbehav.2010.02.005</ref> and hour-glass shaped body that men strongly desire, but which serve no known biological purpose. Besides an outcome of sexual selection, the importance people put on looks in mate choice could be merely a spandrel of a general preference for aesthetics, or it could be driven by a link between good looks and overall [[good genes hypothesis|good and healthy genes]]. | ||
In industrialized nations, facial masculinity is unrelated to mating and [[reproductive success]] (RS). Strength and muscularity | In industrialized nations, facial masculinity is unrelated to mating and [[reproductive success]] (RS). Strength and muscularity are also only weak, but consistent predictors of RS.<ref>https://www.biorxiv.org/content/10.1101/2020.03.06.980896v3</ref> | ||
Women's hourglass shaped waist is | Women's hourglass shaped waist is not linked to higher RS or better health.<ref>https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6563790/</ref> Unless there are strong confounds in industrial nations, the absence of a link to RS means these traits are unlikely sexually selected. Men's V-shaped upper body, especially determined by the collar bone length, may be subject to sexual selection as it is [[sexual dimorphism|sexually dimorphic]], linked to RS and women's attractiveness ratings. At the same time, a long collar bone actually decreases chances of survival, resulting in decreased strength and throwing ability (see [[body attractiveness]]). However, adaptations that merely fake physical strength may also have evolved as a means of physical intimidation during male [[intrasexual competition]]. See the [[penis]] article for a discussion of the plausibility of sexual selection having acted upon it. | ||
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Inaccurate and boring: | Inaccurate and boring: | ||