Sex chat videos between girl and a boy
The average (median, technically) across all couples, though, was 5.4 minutes.
This means that if you line up the 500 couples from shortest sex to longest sex, the middle couple goes for an average of 5.4 minutes each time they do it.
Psychologists at Radboud University in The Netherlands carried out the study after one of them was so struck on impressing an attractive woman he had never met before, that he could not remember his address when she asked him where he lived.
Researchers said it was as if he was so keen to make an impression he 'temporarily absorbed most of his cognitive resources.' To see if other men were affected in the same way, they recruited 40 male heterosexual students.
In a report on their findings the researchers said: 'We conclude men's cognitive functioning may temporarily decline after an interaction with an attractive woman.' Psychologist Dr George Fieldman, a member of the British Psychological Society, said the findings reflect the fact that men are programmed to think about ways to pass on their genes.
'When a man meets a pretty woman, he is what we call 'reproductively focused'.