Why do some men and women cheat on their partners while other resist the temptation?
To find the answer,a growing body of research is focussing on the science of commitment. Scientists are studying everything from the biological factors that seem to influence marital stability to a person's psychological response after flirting with a stranger.
Their finding suggest that while some people may be naturally more resistant to temptation,men and women can also train themselves to protect their relationship and raise their feelings of commitment.
Recent studies have raised question about whether genetic factors may influence commitment and marital stability. Hasse walum, a biologist at karolinska institution in Sweden, studied 552 sets of twins to learn more about a gene related to the body's regulation of the brain chemical vasopressin, a bonding hormone
Over all, men who carried a variation in the gene were less likely to be married,and those who had wed were more likely to have had serious marital problems and unhappy wives. Among men who carried two copies of the gene variant, about a third had experienced a serious relationship crisis in the year, double the number seen in the men who did not Carry the variant.
Although the trait is often called"infidelity gene" walum called that a misnomer: his research focused on on marital stability, not faithfulness."it's difficult to use this information to predict any future behavior in men" he told me.
Now he and his Colleagues are working to replicate the finding and conducting similar research in women.