Premature ejaculators of the world, take heart. Scientific research is now on your side.

According to a new study in the Journal of Sexual Medicine, the best sex should last between seven and 13 minutes. The report, which surveyed a random sample of Americans and Canadians, also found that most people considered sex lasting three to seven minutes "adequate," and most thought sex for over 13 minutes was "too long."

Other recent studies show that while most people in the United States expect sex to last between 15 and 20 minutes, it is generally over in about half that time.

Interestingly, in response to the survey, Australian sex therapist Jane Howard noted that women are generally happy with a quick hit, while men tend not to be.

"There is a major gender difference in this area," Dr Howard is quoted as saying. "Usually women are quite happy with short intercourse, and are not bothered about prolonging it at all, but nearly all men want it to be much, much longer."

The money shot: Let's hear it, boys. Do you like it longer or shorter than ten minutes?

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