Fisherian runaway: Difference between revisions

Positive feedback loops in sexual selection can be arbitrarily initiated when a trait is slightly correlated with fitness, for example when it is associated with viability, objectively [[beauty|aesthetic]] (aesthetic sexual selection), or when a trait is similar in appearance to already attractive or otherwise valued objects or body parts.<ref>Fuller, R. C., Houle, D., & Travis, J. 2005. ''Sensory Bias as an Explanation for the Evolution of Mate Preferences.'' [[https://www.jstor.org/stable/10.1086/444443 Abstract]], p. 444</ref> For example, women's breasts may have evolved to mimic their buttocks because the latter was already a sexually attractive body part before humans developed upright posture, and then Fisherian runaway may have lead to breasts becoming increasingly larger and increasingly attractive to men.