Department of Psychology, 6918Oakland University, Rochester, MI, USA.
Evol Psychol. 2023 Jan-Mar;21(1):14747049231161075. doi: 10.1177/14747049231161075.
The present studies investigated the relationships between men's perceived risk of experiencing sperm competition (i.e., when the ejaculates of two or more men simultaneously occupy the reproductive tract of a single woman), and their use of strategies to detect, prevent, and correct their partner's sexual infidelity. We investigated these associations using self-reports provided by men (Study 1, = 113), partner-reports provided by women (Study 2, = 136), and dyadic reports (Study 3, = 103 couples). The results of these studies indicated that the attractiveness of women was consistently associated with men's use of benefit-provisioning mate retention behaviors (e.g., buying expensive gifts for one's partner, showing signs of physical affection) and semen-displacing behaviors (e.g., deeper copulatory thrusting, more thrusts during copulation), whereas the infidelity risk of women was often associated with men's use of cost-inflicting mate retention behaviors (e.g., threatening to end the relationship, monopolization of partner's free time). Discussion addresses the evolutionary implications of these results, including the possibility that men use both benefit-provisioning mate retention behaviors and semen-displacing behaviors when they perceive their partner to be more attractive, ostensibly as a way to mitigate their risk of sperm competition. Discussion also explores the extent to which these results extend those of previous studies concerning sperm competition risk.
本研究探讨了男性感知到的精子竞争风险（即当两个或更多男性的精液同时占据单个女性的生殖道时）与他们用于检测、预防和纠正伴侣性不忠的策略之间的关系。我们使用男性的自我报告（研究 1，n=113）、女性的伴侣报告（研究 2，n=136）和对偶报告（研究 3，n=103 对）来研究这些关联。这些研究的结果表明，女性的吸引力与男性使用提供利益的伴侣保持行为（例如，为伴侣购买昂贵的礼物，表现出身体上的亲昵）和精液置换行为（例如，更深的性交插入，更多的性交插入）有关，而女性的不忠风险往往与男性使用造成成本的伴侣保持行为有关（例如，威胁结束关系，垄断伴侣的空闲时间）。讨论探讨了这些结果的进化意义，包括当男性感知到伴侣更具吸引力时，他们可能会同时使用提供利益的伴侣保持行为和精液置换行为，显然是为了降低精子竞争的风险。讨论还探讨了这些结果在多大程度上扩展了先前关于精子竞争风险的研究。
