While many of us wonder how often we should be having sex, we're also keen to know how long it should ideally last.
Well, if you're Kourtney Kardashian and her husband Travis Barker, then your sex sessions could last up to 90 minutes.
The eldest Kardashian sibling, 44, recently revealed that she and Barker had enjoyed an hour and a half-long tryst.
"I'm so tired," Kourtney said in a new episode of her family's reality TV show, The Kardashians.
"Probably from having your 20-minute sex session downstairs," her younger sister Khloe, 38, said back.
Kourtney replied: "Well, we had one this morning for like, an hour and a half, and I had one last night and the day before."
When asked how she has sex for an hour and a half, Kourtney replied: "You know, we’re just living our best lives."
While you may not be game for marathon 90-minute sessions like Kourtney, how long should sex be lasting?
It's important to remember that everyone is different and you need be yourself in the bedroom, but it turns out there is a magic number when it comes to the length of time we're getting down to action.
Research by online sex retailer Lovehoney aimed to find out the ideal number of minutes of intimacy people would like to enjoy.
Drumroll… it’s 30 minutes. And yes, that includes both sex and foreplay.
Although 40% of people said their ideal sex session would last more than 30 minutes, only 24% said they were actually getting it for that long.
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Turns out there's a bit of a difference between how long we're spending between the sheets and how long we might want to be, with almost half of all those polled (47%) saying they were spending 15 minutes getting raunchy. And for 16% of respondents sex is lasting just 10 minutes.
As well as uncovering the holy grail of intimate minutes, the research also looked at how often poll participants were having sex as well as when they tended to do it.
Turns out that while half (50%) are getting it on at least once a week, there was no "best time" to do it.
The survey comes as further research reveals the cities where singles have gone the longest without sex.
Research by dating site called Desperate Dating, found that singles in Bradford have, on average, been single for five years and three months and have spent six years without sex.
Singles in Wakefield have the second-longest dry spell at five years and six months, while single people in Sheffield went for five years and one month without having sex on average.
A separate survey by Superdrug found that the average single person had sex every two months, while the average person in a relationship or married had sex once per week.
However, there were exceptions to these rules as it found that a few of the 1,500 people it surveyed who were single had gone without sex for two decades – one even for 27 years.