Relationships4 min(s) read
Published 10:35 11 Aug 2026 GMT
The 72-hour rule is doing the rounds again.
The idea is simple - have sex, or at least some form of physical intimacy, every three days.
No exceptions, no excuses - put it in the diary if you have to.
Half the internet thinks it sounds clinical and exhausting.
The other half is into it.
Sex therapists are somewhere in the middle.
It is exactly what it sounds like.
Never let more than 72 hours pass between intimate moments with your partner.
That could be sex, or it could be something else.
The point is to have regular, deliberate physical connection rather than waiting for the mood to strike on its own.
The theory is that the longer a couple goes without being intimate, the harder it becomes to start again.
Three days is short enough to stop the drift before it sets in.
Leigh Norén, a sex therapist and coach, told Stylist that structured intimacy can genuinely help.
"Intimacy, whether physical, emotional or sexual, can often fall by the wayside in long-term relationships," she said.
"While Hollywood has us believe that if we're with the right person, we don't need to work at it to keep it alive, we absolutely do."
For couples who respond well to routine, Norén said the 72-hour rule works as a regular checkpoint rather than a deadline.
It gives both people permission to initiate without feeling like they are the only one pushing for it.
However, not everyone agrees.
Mariàn Martínez, a sex and relationships coach at Smile Makers Collection, told the same outlet she thinks the rule is solving the wrong problem.
"Most don't stop having sex because they forgot to put it in the diary," she said.
"They stop because they're exhausted, resentful, disconnected, carrying unequal mental loads, or because desire has become another thing to produce."
Putting a timer on it won't fix any of that.
For couples already struggling, a 72-hour deadline is just another thing to fail at.
The Knot's 2024 Relationship and Intimacy Study found that only 2% of couples actually schedule sex. Meanwhile, 24% said they were dissatisfied with their sex lives.
A separate 2024 study out of New Zealand found that women who have sex at least once a week report the highest relationship satisfaction.
The 72-hour rule sits roughly in that range for most couples.
The correlation between frequency and happiness appears to hold up to a point.
Beyond once a week, the returns flatten out.
Having more sex does not necessarily mean a happier relationship. But having very little sex, or none at all, tends to correlate with lower satisfaction on both sides.
Depends on the couple.
If both people are genuinely on board and the only problem is that life has got in the way, it can help.
It takes sex out of the category of things that might happen and puts it in the category of things both people have agreed to do. That shift alone can make a difference.
If the issue is deeper than that, if there is resentment or exhaustion or a mismatch in desire, putting a number on it is not going to fix anything. It might make it worse.
The number itself is almost beside the point.
Three days, once a week, twice a week.
What matters is the conversation behind it.
Two people agreeing that physical intimacy is something worth protecting rather than something that just happens when both of them are in the mood at the same time, which in a long-term relationship is basically never.
The 72-hour rule will not save a relationship that has bigger problems.
But for couples who have just let things slide and are not sure how to get back, it is definitely a place to start.
