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夫妻性生活频率的呈下降趋势
随着年龄的增长，性生活的频率呈下降趋势：20~30岁时每周大约3次，31~40岁每周2次，41~50岁每周1~2次，51~55岁每周1次。但是当代人性生活的频率具有极大的个体差异。
性生活频率是夫妻性生活最直观也最重要的表现，但是性生活频率受着婚姻状态、身体素质、双方年龄以及性能力强弱等多方面影响面有很大差异，并一直处在动态变化当中。
如一项对当代美国人性生活频率的调查显示，有8%的男性和7%的女性每周性生活达4次以上，26%的男性和30%的女性每周性生活2~3次，16%的男人和18%的女人在一年内过几次性生活，还有14%男性和10%女性在调查前一年中基本没有性生活。
在夫妻性生活频率上，与年龄具有同样重要意义的是婚龄的影响。根据着名性学家玛斯特斯援引的资料，在所调查的新婚夫妇中，第一年每月性生活频率为14.8次，以后逐年减少，第二年则为12.2次，第四五年每月9次，而到了第六年便减少到6.3次。在许多性学家指出夫妻向性交频率随婚龄增加而下降的同时，也有报告指出确有一些夫妻在婚后15~20年时性生活频率达到顶峰。
目前大多数调查和普遍看法是，教育程度、职业类别和宗教信仰对夫妻性生活频率无显着影响。
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