
But Aussie sex therapists commenting on the new research say most men Down Under wanted it to last considerably longer while most women were "not bothered" if it was over with fast.
The sex study is the first to review what the experts believe is the ideal length of time to have penetrative sex, with the random sample of Americans and Canadians labelling seven to 13 minutes most "desirable".
Three to seven minutes was considered "adequate" for intercourse but anything less was "too short" and beyond 13 minutes was "too long".
US studies show Americans expect penetrative sex to last between 15 and 20 minutes, even though sel- reports indicate it is over in less than half this time.
Lead researcher Dr Eric Corty, from the Behrend College in Erie, Pennsylvania, said this was a situation "ripe for disappointment and dissatisfaction".
"In the fantasy model of male sexuality, men have large penises, rock-hard erections, and can sustain sexual activity all night long," Dr Corty wrote.
"It appears that many men and women hold this fantasy. The results from the present study, by providing a realistic not a fantasy model of sexuality, are useful both in treating people with sexual concerns and dysfunctions, and, with wider circulation, in preventing the onset of sexual dysfunctions."
Anecdotal evidence suggested most Australian women would be happy with the therapists' "adequate" time of three to seven minutes, while men would not.
Coutsey: Journal of Sexual Medicine (This study has been designed to calm couples of unrealistic beliefs that healthy sex should last a long time.) and Tamara McLean of The Australian.com
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