Behavioral and Brain Sciences

Short Communication

Adaptive flexibility, testosterone, and mating fitness: Are low FA individuals the pinnacle of evolution?

Michael R. Cunningham a1
a1 Department of Psychological and Brain Sciences, University of Louisville, Louisville, KY 40292


The expansion of human evolutionary theory into the domain of personal and environmental determinants of mating strategies is applauded. Questions are raised about the relation between fluctuating asymmetry (FA), testosterone, and body size and their effects on male behavior and outcomes. Low FA males' short-term mating pattern is considered in the context of an evolved tendency for closer and longer human relationships.