ABSTRACT

Most men show sexual arousal to one, preferred sex, whereas most women respond to both sexes, regardless of their sexual orientation. A different research program indicates that men have lower second-to-fourth finger length ratios (2D:4D) than women, possibly because men are exposed to higher levels of androgens during prenatal development. We hypothesized that sex differences in sexual arousal patterns are influenced by prenatal androgen exposure and would thus be explained by sex differences in 2D:4D. We measured the sexual response patterns of 139 men and 179 women via genital arousal and pupil dilation to erotic videos, in addition to their 2D:4D. Compared to women, men showed stronger responses to one sex over the other, although this pattern was clearer in genital arousal than pupil dilation. Men also had lower 2D:4D than women. However, there was no evidence that sex differences in sexual arousal related to sex differences in 2D:4D. Thus, whichever factor explains sex differences in sexual arousal patterns may not be reflected in 2D:4D.

摘要

大多数男性对一种偏好的性别表现出性唤起，而大多数女性对两种性别都有反应，无论其性取向如何。一项不同的研究计划表明，男性的二指与四指长度比 (2D:4D) 低于女性，这可能是因为男性在产前发育期间暴露于较高水平的雄激素。我们假设性唤起模式的性别差异受产前雄激素暴露的影响，因此可以通过 2D:4D 中的性别差异来解释。除了 2D:4D 之外，我们还通过生殖器唤醒和对色情视频的瞳孔扩张测量了 139 名男性和 179 名女性的性反应模式。与女性相比，男性对一种性别的反应比另一种更强烈，尽管这种模式在生殖器唤醒方面比瞳孔扩张更明显。男性的 2D:4D 也低于女性。然而，没有证据表明性唤起的性别差异与 2D:4D 中的性别差异有关。因此，解释性唤起模式中性别差异的任何因素都可能不会反映在 2D:4D 中。