来自《耶鲁大学开放课程：心理学导论 第14集》

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  of times people have sex because
  人们想要什么 男性和女性的差异
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  if males and females have different priorities,
  因为男女存在不同的侧重点
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  then heterosexual sex is a compromise
  而异性恋者需要在
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  between two groups of people with competing interests.
  双方不同的兴趣间互相妥协
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  What's a more clear reflection then
  所以更能清楚反映这种差异的应该是
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  is gay sex between two women or between two men,
  男人间或女人间的同性性行为
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  because then you get a pure reflection of sexual desire.
  这样可以得到性欲的纯粹反映
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  Now, the data here tend to be very messy.
  好 这里的数据看起来很混乱
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  Again, they're survey studies
  同样的 他们进行的是调查研究
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  but by and large every study done
  但大多数已经进行的研究
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  tends to find a difference in the expected direction,
  都发现了符合期望的差异
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  which is that females tend to be--
  那就是女性更倾向于