Investigators attributed changes to one or more causes including operational sex ratio, adult sex ratio, potential reproductive rate, predation risk, disease risk, chooser’s mating experience, chooser’s age, chooser’s condition, or chooser’s resources. Most studies reported changes from choosy to indiscriminate behavior of subjects. We found >3000 studies 198 were empirical studies of within-sex phenotypic plasticity, and sixteen showed no evidence of mate choice plasticity. We reviewed the literature on phenotypic plasticity in mate choice with the goal of exploring whether phenotypic plasticity can be interpreted as individual flexibility in the context of the switch point theorem, SPT (Gowaty and Hubbell 2009). Recently, mate choice studies have increasingly attended to the environmental circumstances affecting variation in choosers’ behavior and choosers’ traits. Mate choice hypotheses usually focus on trait variation of chosen individuals.
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