The constellation of co-adapted traits that facilitate short-term mating promote the use of riskier and interpersonally antagonistic intrasexual competition tactics. Aggressive behavior can be used to vie against rivals for mates and resources that facilitate reproductive success; however, there is limited research regarding whether individual differences in a short-term mating orientation (i.e., unrestricted sociosexuality) are reliably associated with same-sex aggression, particularly indirect aggression. There is also some research suggesting that short-term mating tendencies are linked to inter-individual variability in the desire to compete with same-sex others for access to mates and reproductive resources (i.e., intrasexual competitiveness). We therefore speculated that intrasexual competitiveness might help to explain why those pursuing a short-term mating strategy may perpetrate more indirect aggression toward same-sex peers. In a sample of 290 Canadian heterosexual young adults, unrestricted sociosexuality positively predicted same-sex indirect aggression and intrasexual competitiveness, and intrasexual competitiveness mediated the positive link between unrestricted sociosexuality and indirect aggression. Exploratory analyses revealed that the desire facet of sociosexuality was driving the effect. These findings suggest that those with a short-term mating orientation, particularly those with unrestricted sociosexual desires, engage in more indirect aggression against same-sex peers, and that this association is, in part, explained by an inclination to be combative with same-sex rivals over social and mating resources.

促进短期交配的共同适应特征的星座促进了使用风险更大和人际对抗的性内竞争策略。攻击性行为可用于与竞争对手争夺有助于繁殖成功的配偶和资源；然而，关于短期交配取向（即不受限制的社会性行为）中的个体差异是否与同性攻击，特别是间接攻击可靠相关的研究有限。还有一些研究表明，短期交配倾向与个体间的变异性有关，即与同性其他人竞争获得配偶和生殖资源的愿望（即性内竞争）。因此，我们推测，性内竞争可能有助于解释为什么那些追求短期交配策略的人可能会对同性同伴进行更多的间接攻击。在 290 名加拿大异性恋青年的样本中，不受限制的社会性行为正向预测同性间接攻击和性内竞争，而性内竞争在不受限制的社会性行为和间接攻击之间的正向联系中起中介作用。探索性分析表明，社会性行为的欲望方面正在推动这种影响。这些研究结果表明，那些具有短期交配倾向的人，尤其是那些具有不受限制的社会性欲的人，会对同性同伴进行更多的间接攻击，并且这种关联部分是，