In these cases it is hard to conceive of any explanation other than infidelity on the part of the woman—a hypothesis supported by the observation that female-positive discordancy is more common in polygamous marriages, where a wife is competing for attention from her husband, than in monogamous ones.

那么曰本人的三级视频，除了不貞之外很難想象任何其他理由來解釋這些地區(qū)由女性導(dǎo)致的不一致關(guān)系率。一個現(xiàn)象的觀察資料可以支持這個假設(shè)手机看片,你懂的，女性主導(dǎo)的不一致關(guān)系在一夫多妻的婚姻里發(fā)生的概率高于一夫一妻的婚姻欧美性爱欧美性爱欧美性爱，在這種婚姻里，女性需要通過競爭才能得到丈夫的關(guān)注欧美一级a大片免费看u。

She found that polygamy is more common in societies that have more disease.

她發(fā)現(xiàn)wwwA片，一夫多妻制在多疾病的社會里更為普遍。

It was not yet strict monogamy, as polygamy was permitted for the leading members of the tribe .

這還不是嚴(yán)格的一夫一妻制男人色色网站，因為還允許顯貴實(shí)行多妻制国产精品亚洲黄色录像。

It was not yet strict monogamous , as polygamy was permitted for the leading members of the tribe.

這還不是嚴(yán)格的一夫一妻制，因為還允許顯貴實(shí)行多妻制国产一级无码黄片。

What they don't realize is that, for most men who are not extremely desirable, polygyny means no wife at all, or, if they are lucky, a wife who is much less desirable than one they could get under monogamy.Copyright belongs to Psychology Today.

他們沒有意識到的是av毛在线看麻豆醉地，對于絕大多數(shù)一般般的男性而言，一夫多妻制意味著沒有老婆日韩大学生无码视频，或者福利xxxx视频，幸運(yùn)點(diǎn)的人，可能娶到一個遠(yuǎn)遠(yuǎn)不如其在一夫一妻制社會中能娶到的老婆亚洲欧洲av官网。

What they don't realize is that, for most men who are not extremely desirable, polygyny means no wife at all, or, if they are lucky, a wife who is much less desirable than one they could get under monogamy.

他們沒有意識到對于大多數(shù)男性來說国产欧美日韩操逼视频，他們的性欲并沒是極度強(qiáng)烈，而且一夫多妻制度意味著一個妻子也沒有4444免费，或者如果他們幸運(yùn)地話色色色色色色女内，找到的是一個比在一夫一妻制度下性欲會低很多的妻子。

They wanted to find out whether polygynous males had lower survival rates and aged faster than those of monogamous species.

他們希望發(fā)現(xiàn)一夫多妻制的雄性是否比一夫一妻制的雄性的存活率更低而且老得更快A级毛片无码免费真人久久久。

They wanted to find out whether polygynous males had lower survival rates and aged fast er than those of monogamous species.

他們希望發(fā)現(xiàn)一夫多妻制的雄性是否比一夫一妻制的雄性的存活率更低而且老得更快视频在线看一区二区。

As George Bernard Shaw puts it,"The maternal instinct leads a woman to prefer a tenth share in a first-rate man to the exclusive possession of a third-rate one." Despite the fact that humans are naturally polygynous, most industrial societies are monogamous because men tend to be more or less equal in their resources compared with their ancestors in medieval times.

正如George Bernard Shaw 所說，&母姓的直覺會導(dǎo)致一名女人寧愿選擇要&一流男人&的十分之一亚洲日韩另类一区欧美，也不愿意要獨(dú)自占有&三流男人&的全部&盡管說人類自然會選擇一夫多妻影音先锋欧美精品，但是，大部分的工業(yè)化國家都是一夫一妻91黄在线，因為那里的男性往往和自己在中世紀(jì)的祖先相比在資源方面要或多或少地更加平均化欧美快一级。

To test that idea, Tim Clutton-Brock of Cambridge University and Kavita Isvaran of the Indian Institute of Science in Bengalooru decided to compare monogamous and polygynous species (in the latter, a male monopolises a number of females).

為了證實(shí)這一理論，劍橋大學(xué)的提姆·克拉頓·布羅克和位于本加魯魯?shù)挠《壤砉W(xué)院的卡維塔·艾斯瓦蘭決定對一夫一妻制和一夫多妻制的物種進(jìn)行比較（在后者中九操在线亚洲，一個雄性獨(dú)占數(shù)個雌性）中文字幕黄色福利视频。