5.4 minutesSo it's clear there's no one “normal” amount of time to have sex. 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.Apr 3, 2016How often do people have sex? Australians report having sex once or twice a week, on average. For Brits, it's less than once a week, while Americans report having sex two to three times a week.