Men biologically wired to not desire sex with their best friends' wives: study

Men biologically wired to not desire sex with their best friends' …A new US study finds that men may have a natural aversion to the idea of having sex with their best friends' wives.

A University of Missouri study has found that adult males' testosterone levels dropped when they were interacting with the marital partner of a close friend. Prior studies have already shown suggested that men's testosterone levels influence competition among males trying to attract females.

"Although men have many chances to pursue a friend's mate, propositions for adultery are relatively rare on a per opportunity basis," says lead researcher and anthropology professor Mark Flinn.

The team posits that humans evolved this way to keep the peace within tribes. "Men's testosterone levels generally increase when they are interacting with a potential sexual partner or an enemy's mate," he adds. "However, our findings suggest that men's minds have evolved to foster a situation where the stable pair bonds of friends are respected."

"Ultimately, our findings about testosterone levels illuminate how people have evolved to form alliances," says Flinn. He adds that the findings could have implications for larger issues, from resolving conflicts to solving mutual threats, such as climate change, that is, if people could "view the Earth as a single community of people," he says.

The study, announced Thursday, appears in the journal Human Nature.


Related: Mid-life well-being depends on number of friends you have: study


Another study last year on male testosterone levels found that human males are biologically wired to care for their offspring, and that fatherhood lowers a man's testerone levels.

Research has also found that men are much more attracted to their female friends than vice versa -- and that men are also more likely to believe that their female friends are more attracted to them than they are in reality.






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Photo by: Cecily Kellogg
Having Faith In Each Other
As a child of divorce, I really struggled with having faith in the men I dated. I lived with two other guys before living with my husband, and I had ... more 
Photo by: Cecily Kellogg
Having Faith In Each Other
As a child of divorce, I really struggled with having faith in the men I dated. I lived with two other guys before living with my husband, and I had no faith in them at all. I was sure they'd leave me, and sure enough, they both did. When Charlie and I first got together I tried to dump him every time any stress happened in our relationship. Because I didn't believe he'd stay, I was always pushing him out the door. Luckily each time I did that, he would look at me like I was insane and say, "No. I'm not breaking up with you because the electric bill is late." As a result, I learned to have faith in him. And I do; I feel utterly secure in our relationship.
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Thu, Feb 21, 2013 2:02 AM PHT

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