Courtesy of the Mail:
‘The time couples spend together after sex might be as important as what happens before it in terms of building the relationship yet it has rarely been studied.’
While this study did not confirm that men were more likely to fall asleep first, he said two of his previous studies and other research suggested it was true.
A study last year linked this to production of the hormones oxytocin and prolactin which create a sedative, or ‘roll over and snore’ effect in men after making love.
But Dr Kruger and his co-author Susan Hughes of Albright College in Pennsylvania believe there are evolutionary as well as chemical reasons for it.
They suggest falling asleep before their partner may be a non-conscious way for men to ‘foreclose’ any conversations about commitment.
This is just what their wives and girlfriends crave, they say, as women have more highly developed language skills.
Dr Kruger added: ‘For men, in evolutionary terms there’s more of an incentive to have other sexual partners to advance their reproductive success whereas for women there is more incentive to secure the relationship.’
