Our happy hour fact to amaze your drinking buddies with.

Men with excess body fat last four times longer in bed than their fit counterparts.

Researchers at Erciyes University in Turkey found that a man with a normal body mass index (BMI) can only have sex for an average of 1.8 minutes before ejaculating, whereas a man with a BMI that indicates he is overweight or obese can keep it going for an average of 7.2 minutes.

Scientists believe the reason for this discrepancy is that the fatter a guy is, the more of the female sex hormone oestradiol he has. Since oestradiol screws with a male's overall chemical balance, it makes him take longer to perform his most manly of functions.

However, we're not really sure if women who end up pinned beneath a portly fellow appreciate his hormone-aided ability to keep going and going.