性交往是人类繁衍出现差异的进化“引擎”。现代人继承了祖先成功繁衍后代的性交往策略。这些策略涵盖长期守诺的性交往(如婚姻)、短期性交往(如短暂的外遇)、婚姻外的性交往(如不忠)、私通他人配偶(引诱别人的配偶)以及配偶维持(与单一配偶性交往)等。两性在性交往过程中面临不同的适应问题,性交往问题的进化机制存在极大的性别差异。配偶偏好不同、短期性交往的愿望不同以及性嫉妒的诱因不同等都是性交往具有性别差异的表现。很多实证研究都证实了性交往策略的存在,人类性交往研究是进化心理学研究中较为成熟的一个研究领域。 Sexual intercourse is the evolutionary “engine” for the emergence of differences in human reproduction. Modern people inherited the ancestors succeeded in breeding offspring sexual intercourse strategy. These strategies include long-term commitment to sexual intercourse (such as marriage), short-term sexual intercourse (such as transient affair), sexual intercourse outside of marriage (such as infidelity), private spouse (spurring others spouses) Single spouse sex) and so on. Both sexes face different adaptation problems during sexual intercourse, and there are great gender differences in the evolutionary mechanisms of sexual intercourse problems. Spouses’ preferences are different, the desire of short-term sexual intercourse and the jealousy of the different incentives are sexual intercourse with gender differences in performance. Many empirical studies confirm the existence of sexual intercourse strategies. Human sexual intercourse research is a relatively mature field of research in evolutionary psychology.