Abstract

Abstract Most evolutionary theories of human mating have focused on the adaptive benefits of short-term mating for men. Men cannot pursue a strategy of short-term mating, however, without willing women. Existing empirical evidence suggests that some women engage in short-term mating some of the time and probably have done so recurrently over human evolutionary history. The current studies tested hypotheses about the potential benefits women might derive from engaging in one type of short-term mating — extra-pair liaisons — and the contexts in which they do so. These include resource hypotheses (e.g. immediate resource accrual), genetic hypotheses (e.g. having genetically diverse offspring), mate switching hypotheses (e.g. acquiring a better mate), mate skill acquisition hypotheses (e.g. mate preference clarification) and mate manipulation hypotheses (e.g. deterring a partner's future infidelity). These hypotheses were tested by examining the perceived likelihood that women would receive particular benefits through a short-term extra-pair mating (Study 1); the perceived magnitude of benefits if received (Study 2); the contexts in which women engage in short-term extra-pair mating (Study 3); and individual differences among women in proclivity to pursue short-term matings in their perceptions of benefits (Study 4). Most strongly supported across all four studies were the mate switching and resource acquisition hypotheses. Discussion focuses on the distinction between functions and beneficial effects of short-term mating, limitations of the current studies and the consequences of women's short-term mating strategies for the broader matrix of human mating.

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