Many cultures have fashion items, like penis sheaths and codpieces, that draw attention toward male genitalia 20 , highlighting the potential for female choice to influence the evolution of male genitalia. These relationships can influence evolution via correlational selection
More broadly, our results show that precopulatory sexual selection can play a role in the evolution of genital traits.
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The latter two traits have regularly been investigated and are known to influence male attractiveness or reproductive success [height 15 , 33 — 35 , shape 18 , 36 , 37 ].
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We tested for the effects of flaccid penis size, body shape shoulder-to-hip ratio , and height on male sexual attractiveness.
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