这说明：偷情是天生的，要想找不偷情的，先去查基因。如果大家真的都不喜欢偷情的，可以用查基因的办法，把偷情的都淘汰掉，使偷情基因灭绝。但估计不是每个人都讨厌偷情的。

还有，这个基因也会影响政治态度。怎么影响的？请看原文。

王小东

 

The love-cheat gene: One in four born to be unfaithful, claim scientists

By Niall Firth and Fiona Macrae
Last updated at 2:27 PM on 3rd December 2010

 

 

It might seem like the perfect get-out clause for those with a ­roving eye: some people just aren’t built to be faithful.

Scientists have found a gene that raises the odds of ­cheating on a partner.

They say that when a man or woman with the ‘love rat gene’ has an affair, they receive the same chemical rush as a gambler whose luck has changed or an alcoholic savouring a drink.

Researchers quizzed 180 young men and women about their attitude towards relationships and tested them for a gene called DRD4, which affects levels of the brain chemical dopamine.

The one quarter or so with the ‘love rat’ version of the gene were more than twice as likely to be unfaithful. And when they did cheat, they had more one-night stands, the journal PLoS ONE reports.

Researcher Justin Garcia said: ‘What we found was that individuals with a certain variant of the DRD4 gene were more likely to have a history of uncommitted sex, including one-night stands and acts of infidelity.

‘The motivation seems to stem from a system of pleasure and reward, which is where the release of dopamine comes in.

‘In cases of uncommitted sex, the risks are high, the rewards substantial and the motivation variable – all elements that ensure a dopamine “rush”.’

He added that his results suggest it is possible to feel committed to a partner, but still feel the need to cheat on them.

But those with a wandering eye cannot wholly blame their genes.

Mr Garcia, of the State University of New York, said: ‘The study doesn’t let transgressors off the hook. Not everyone with this ­genotype (genetic make-up) will have one-night stands or commit infidelity.’

Last month, scientists found that the same strain of the DRD4 gene can also make people have more liberal views.

Because the genetic variant drives people to seek out ‘novelty’, it can also make people more likely to seek out less conventional political views, the U.S. study found.

Those with the gene supposedly seek out other people’s points of view and are influenced by them far more than those without the gene.

In the U.S. this mean that people with the gene were more likely to have a liberal political viewpoint.

Read more: http://www.dailymail.co.uk/sciencetech/article-1334932/The-love-cheat-gene-One-born-unfaithful-claim-scientists.html#ixzz17Oad8qRc