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首页> 外文期刊>BMC Evolutionary Biology >Selflessness is sexy: reported helping behaviour increases desirability of men and women as long-term sexual partners
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Selflessness is sexy: reported helping behaviour increases desirability of men and women as long-term sexual partners

机译：无私是性感的：据报道，帮助行为增加了男人和女人作为长期性伴侣的渴望

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Background Despite its short-term costs, behaviour that appears altruistic can increase an individual’s inclusive fitness by earning direct (selfish) and/or indirect (kin-selected) benefits. An evolved preference for other-regarding or helping behaviour in potential mates has been proposed as an additional mechanism by which these behaviours can yield direct fitness benefits in humans. Results We asked 32 heterosexual women and 35 heterosexual men to rate the attractiveness of members of the opposite sex in the presence and the absence of information about helping behaviours. Reports of helping behaviour were associated with a significant increase in the attractiveness of both men and women as potential long-term sexual partners. Altruism also increased the attractiveness of men as potential partners for short-term flings, but to a lesser extent than when the same men were being considered for long-term relationships. Altruism did not affect the attractiveness of women as partners for short-term flings. Conclusions Our results unite two important areas of evolutionary theory – social evolution and sexual selection – and extend the list of means by which helping behaviours, which appear at first glance to be costly to the actor, can in fact earn direct fitness benefits. Helping behaviours may be attractive because they signal ‘good genes’ and/or because they are perceived as a signal of likely provision of non-genetic benefits (e.g. parental care). Exactly why helping behaviours in a non-mating context might be attractive to potential mates, and whether they are honest signals of mate quality, remains to be elucidated.
机译：背景知识尽管利他行为是短期的，但他们可以通过获得直接（自私）和/或间接（亲属选择）的利益来提高个人的包容性。已经提出了对潜在伴侣中其他考虑或帮助行为的进化偏好，作为一种额外的机制，通过这些机制，这些行为可以在人类中产生直接的健身益处。结果我们询问了32位异性恋女性和35位异性恋男性，以评估存在和不存在有关帮助行为的信息时，异性成员的吸引力。关于帮助行为的报道与作为潜在的长期性伴侣的男人和女人的吸引力大大增加有关。利他主义也增加了男人作为短期伴侣的潜在伴侣的吸引力，但是程度要比考虑将同一个男人作为长期恋人的程度要小。利他主义并没有影响妇女作为短期逃亡伴侣的吸引力。结论我们的研究结果将进化论的两个重要领域结合在一起：社会进化和性选择，并扩大了帮助行为的清单，这些行为乍一看似乎对演员来说是昂贵的，但实际上它们可以直接受益。帮助行为可能很有吸引力，因为它们表明“好基因”和/或被认为是可能提供非遗传收益（例如，父母照料）的信号。究竟为什么在非交配的情况下帮助行为可能会吸引潜在的伴侣，以及它们是否是伴侣质量的诚实信号，还有待阐明。

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