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Sexual orientation predicts men's preferences for sexually dimorphic face-shape characteristics: A replication study.

ABSTRACT: Many researchers have proposed that straight men prefer women's faces displaying feminine shape characteristics at least partly because mating with such women will produce healthier offspring. Although a prediction of this adaptation-for-mate-choice hypothesis is that straight men will show stronger preferences for feminized versus masculinized versions of women's faces than will gay men, only one previous study has directly tested this prediction. Here we directly replicated that study by comparing 623 gay and 3163 straight men's preferences for feminized versus masculinized versions of faces. Consistent with the adaptation-for-mate-choice hypothesis of straight men's femininity preferences, we found that straight men showed significantly stronger preferences for feminized female faces than did gay men. Consistent with previous research suggesting that gay men place a premium on masculinity in potential romantic partners, we also found that gay men showed significantly stronger preferences for masculinized versions of male faces than did straight men. Together, these findings indicate the sexual orientation contributes to individual differences in men's face preferences.

SUBMITTER: Shiramizu V

PROVIDER: S-EPMC7665808 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Sexual orientation predicts men's preferences for sexually dimorphic face-shape characteristics: A replication study.

Shiramizu Victor V Docherty Ciaran C DeBruine Lisa M LM Jones Benedict C BC

PloS one 20201113 11

Many researchers have proposed that straight men prefer women's faces displaying feminine shape characteristics at least partly because mating with such women will produce healthier offspring. Although a prediction of this adaptation-for-mate-choice hypothesis is that straight men will show stronger preferences for feminized versus masculinized versions of women's faces than will gay men, only one previous study has directly tested this prediction. Here we directly replicated that study by compa ...[more]

PMID: 33186368

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Project description:BackgroundPelvic brooding is a form of uni-parental care, and likely evolved in parallel in two lineages of Sulawesi ricefishes. Contrary to all other ricefishes, females of pelvic brooding species do not deposit eggs at a substrate (transfer brooding), but carry them until the fry hatches. We assume that modifications reducing the costs of egg carrying are beneficial for pelvic brooding females, but likely disadvantageous in conspecific males, which might be resolved by the evolution of sexual dimorphism via sexual antagonistic selection. Thus we hypothesize that the evolution of pelvic brooding gave rise to female-specific skeletal adaptations that are shared by both pelvic brooding lineages, but are absent in conspecific males and transfer brooding species. To tackle this, we combine 3D-imaging and morphometrics to analyze skeletal adaptations to pelvic brooding.ResultsThe morphology of skeletal traits correlated with sex and brooding strategy across seven ricefish species. Pelvic brooding females have short ribs caudal of the pelvic girdle forming a ventral concavity and clearly elongated and thickened pelvic fins compared to both sexes of transfer brooding species. The ventral concavity limits the body cavity volume in female pelvic brooders. Thus body volumes are smaller compared to males in pelvic brooding species, a pattern sharply contrasted by transfer brooding species.ConclusionsWe showed in a comparative framework that highly similar, sexually dimorphic traits evolved in parallel in both lineages of pelvic brooding ricefish species. Key traits, present in all pelvic brooding females, were absent or much less pronounced in conspecific males and both sexes of transfer brooding species, indicating that they are non-beneficial or even maladaptive for ricefishes not providing extended care. We assume that the combination of ventral concavity and robust, elongated fins reduces drag of brooding females and provides protection and stability to the egg cluster. Thus ricefishes are one of the rare examples where environmental factors rather than sexual selection shaped the evolution of sexually dimorphic skeletal adaptations.

Dataset Information

Sexual orientation predicts men's preferences for sexually dimorphic face-shape characteristics: A replication study.

Publications

Sexual orientation predicts men's preferences for sexually dimorphic face-shape characteristics: A replication study.

Similar Datasets

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