Oxytocin amplifies sex differences in human mate choice - ScienceDirect

https://www.sciencedirect.com/science/article/abs/pii/S0306453019305578

Abstract
Infidelity is the major cause of breakups and individuals with a history of infidelity are more likely to repeat it, but may also present a greater opportunity for short-term sexual relationships. Here in a pre-registered, double-blind study involving 160 subjects we report that while both sexes valued faithful individuals most for short-term and long-term relationships, both single men and those in a relationship were more interested in having short-term relationships with previously unfaithful individuals than women. Oxytocin administration resulted in men rating the faces of unfaithful women as more attractive and likeable but in women rating those of unfaithful men as less attractive and also finding them less memorable. Oxytocin also increased single men’s interest in having short-term relationships with previously unfaithful women whereas it increased single women’s interest in having long-term relationships with faithful men. Thus, oxytocin release during courtship may first act to amplify sex-dependent priorities in attraction and mate choice before subsequently promoting romantic bonds.

تجویز اکسی توسین باعث شد که مردان چهره زنان خیانتکار را جذاب‌تر و دوست‌داشتنی‌تر ارزیابی کنند، اما در زنان چهره‌های مردان خیانتکار را جذاب‌تر و همچنین آنها را کمتر به یاد ماندنی می‌دانند. اکسی توسین همچنین علاقه مردان مجرد را به داشتن روابط کوتاه مدت با زنانی که قبلاً خیانت کرده بودند افزایش داد در حالی که علاقه زنان مجرد را به داشتن روابط طولانی مدت با مردان وفادار افزایش داد. بنابراین، ترشح اکسی توسین در دوران نامزدی ممکن است ابتدا اولویت‌های وابسته به جنسیت را در جذابیت و انتخاب همسر تقویت کند و سپس پیوندهای عاشقانه را ترویج کند.