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A hormone that plays a crucial role in social bonding, sexual reproduction and childbirth may also make men more interested in having short-term flings, a new study claims.
Oxytocin, also known as the 'cuddle hormone', is released by the body during 'tender moments' - including while hugging and during sex - and is thought to engender trust and generosity.
But a new study from China has found that it can awaken men's sexual desire - specifically for women who have previously been unfaithful to their partners.
Although the men who took part in the study were found to have a natural preference for women who had been unfaithful in the past, this was exaggerated when they were given the oxytocin hormone as a nasal spray.
This suggests that, at the start of a relationship, the hormone could make sexual attraction more important in the choice of a mate than romantic bonds, the study claims.
After courtship ends and a relationship begins, the hormone then moves on to help build more romantic bonds, say researchers from the University of Electronic Science and Technology of China.
During the study 160 people were shown pictures of members of the opposite sex and told by researchers whether those people had been faithful or unfaithful.
Participants were then asked to give their preference for having a long-term or short-term relationship with the person in the picture.
They found that both sexes clearly prefer fidelity in a prospective long-term partner but the picture differed when it came to short-term relationships.
Men were more likely than women to say they would have a short-term relationship with someone who had been unfaithful.
Women were more likely to want a lasting relationship with a faithful man.
Researchers found that if they gave men the oxytocin as a nasal spray it would exaggerate their preference for short-term relationships with previously unfaithful women.
They found it had the opposite effect in women, who were even more likely to want a long-term relationship with a faithful partner after having the nasal spray.
Source: https://www.dailymail.co.uk
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