Most healthy couples in long-term relationships have sex about three times per month, or roughly once a week. That’s the median from large national surveys, and it also happens to be the frequency most strongly linked to relationship happiness. But averages only tell part of the story. What counts as “normal” varies widely depending on your age, how long you’ve been together, and what actually feels right for both of you.
What the Numbers Actually Look Like
National survey data from 2016 to 2018 shows that about 58% of married men and 61% of married women reported having sex weekly or more. Another 33 to 35% had sex one to three times per month. A small percentage, under 2%, reported no sexual activity at all.
Breaking it down further across all American adults: 25% have sex about once a week, 16% have sex two or three times a week, 19% land at two or three times per month, 17% at once a month, and 5% report four or more times a week. At the other end, about 10% hadn’t had sex in the past year, and 7% had sex only once or twice all year.
The short version: if you’re having sex anywhere from a few times a month to a few times a week, you’re squarely in the range where most couples land.
The Once-a-Week Happiness Threshold
Researchers at the Society for Personality and Social Psychology found a clear pattern when studying the link between sexual frequency and relationship satisfaction. Happiness increased as couples had more sex, but only up to about once a week. Beyond that, the gains flattened out. Couples having sex three or four times a week weren’t measurably happier than those doing it once.
This doesn’t mean more sex is bad. It means that if you’re at roughly once a week, you’re already at the frequency most consistently associated with high satisfaction. Couples who feel pressure to hit some higher number can relax. Quality and connection matter more than a specific count.
How Age Changes the Pattern
Sexual frequency drops gradually with age, which is entirely expected. Men in their 20s average about 2.7 times per week. By the 60s, that drops to roughly once every two weeks. The decline isn’t a cliff; it’s a slow, steady shift that tracks with natural changes in energy, hormones, and health.
Among adults aged 18 to 24 with steady partners, 37% of men and 52% of women reported weekly sex or more. That number climbed in the 25 to 34 range, where about half of men and 54% of women hit weekly frequency. The 35 to 44 bracket looked nearly identical, with roughly 50% of men and 53% of women at weekly or more. The takeaway is that frequency stays relatively stable through your 20s, 30s, and early 40s before tapering more noticeably.
Orientation and Partner Type
Among adults aged 18 to 44 with a steady partner, heterosexual men and women reported weekly sex at similar rates: roughly 51 to 57%. Gay, lesbian, and bisexual men ranged from about 33 to 54% for weekly activity, while gay, lesbian, and bisexual women ranged from 45 to 59%. The spread is wider for same-sex couples, but the overall picture is similar. Most partnered adults of any orientation are having sex somewhere between a few times a month and a few times a week.
What “Sexless” Actually Means
The clinical threshold for a sexless relationship is generally defined as having sex fewer than ten times per year, or less than about once a month. By that measure, roughly 20% of American marriages qualify. That number is higher than most people expect, and it’s worth noting that researchers are quick to point out that low frequency doesn’t automatically signal an unhappy or unhealthy relationship. Some couples have genuinely low desire on both sides and feel perfectly content.
That said, if the low frequency is causing distress for one or both partners, it’s a real problem worth addressing. The mismatch in desire, not the number itself, is what predicts unhappiness.
Sex and Long-Term Health
Regular sexual activity is linked to better health outcomes beyond just relationship satisfaction. A study published in The American Journal of Medicine followed over 1,100 people for 22 years after a heart attack and found a strong association between sexual frequency and survival. Those who had sex more than once a week had a 32% lower risk of death over the study period compared to those who were sexually inactive, even after adjusting for other health factors. Those having sex less than once a week still saw meaningful benefits.
The relationship likely runs in both directions. Healthier people tend to have more sex, and regular sexual activity brings its own benefits: better sleep, reduced stress hormones, improved cardiovascular function, and stronger immune response. It’s not a prescription, but it’s a consistent finding across studies.
Why Couples Today May Be Having Less Sex
Multiple surveys suggest that overall sexual frequency has been declining over the past two decades, including among married and cohabiting couples. A 2019 analysis found the median for married or cohabiting adults had settled at three times per month, which is lower than figures reported in the early 2000s. About 47% of married couples now report having sex less than once a week.
The reasons are layered. Longer work hours, screen time, the mental load of parenting, chronic stress, and the sheer exhaustion of modern life all chip away at opportunities for intimacy. Increased use of antidepressants, which commonly lower libido, is another factor. None of these individually explain the trend, but together they create an environment where sex often gets crowded out by competing demands on time and energy.
If your frequency feels lower than you’d like, context matters more than comparison. A couple with young kids, demanding jobs, and limited sleep is operating in a fundamentally different environment than a couple with no children and flexible schedules. The relevant question isn’t whether you match a national average. It’s whether both partners feel reasonably satisfied with the intimacy in their relationship, and whether they’re making space for it even when life gets busy.