Sex statistics: what the research actually says

How often do people have sex?

Less often than people assume, and less often every decade. The General Social Survey has asked more than 26,620 American adults about frequency since 1972, which makes it the longest-running measure there is. Frequency falls steadily with age, though the young have more sex than the rumours about a sex recession suggest.

Americans in their twenties average 6.7 times a month, roughly 80 times a year. That drops to 5.5 a month at 25 to 34 and to 3.2 by 45 to 54. British adults in Natsal-3, a survey of 15,162 people, report lower figures than Americans at every age.

Twenge, Sherman and Wells showed in 2017 that Americans were having sex about nine fewer times a year in the early 2010s than in the late 1990s, and the drop held after adjusting for age, marriage and health. The single number from the recent GSS that people find hardest to believe: almost one man in three aged 18 to 24 reported no sex at all in the past year. Our frequency calculator gives you a percentile for your age, and sex frequency in married couples covers the numbers inside long relationships.

How long does sex last?

About five and a half minutes, measured. Waldinger and colleagues gave stopwatches to 500 couples in five countries for four weeks in 2005, so nobody had to guess, and the median time from penetration to ejaculation came out at 5.4 minutes, with a range from 0.55 minutes to 44.1. It remains the only large study that timed sex rather than asking about it.

When the Society for Sex Therapy and Research asked its members what counts as what, the therapists agreed on under 2 minutes as too short, 3 to 7 as adequate, 7 to 13 as desirable and over 13 as too long. Put the measured median of 5.4 minutes against that scale and the typical couple sits in "adequate", not in "desirable", which is a more useful thing to know than most of what gets written about stamina.

Ask people instead of timing them and the answers cluster around 10 to 20 minutes, roughly double what the stopwatch found. The duration calculator compares your own timing with the measured distribution rather than the remembered one.

How many sexual partners is normal?

Four for women and six for men, over a lifetime, according to the CDC's National Survey of Family Growth for 2015 to 2019. Those are medians, and they hide a lot of variation by age, generation and religion, but they are a long way below what most people guess when asked.

The reason the guesses run high is the shape of the curve. Most adults have had a handful of partners, and a small number have had a great many, which drags the mean far above the median. So whenever you see an "average" partner count that looks startling, check whether it's a mean. The median is the honest figure, and it's the one this page and the calculator use.

A count is also a running total, so five partners at 25 and five at 50 are not the same fact. The partner count calculator compares you with people your own age and sex, and the same body count calculator page covers what the research says, and doesn't say, about partner count and relationship quality.

What age do people first have sex?

Seventeen, in both countries, and it hasn't moved. Natsal-3 in Britain (2013) and the CDC's NSFG in America (2015 to 2019) both put the median age at first intercourse at 17, the same as it was for the cohorts before. Whatever the cultural anxiety about children growing up faster, the population median has stayed put for twenty years.

By 16, about 35 to 38% of young people in both countries have had sex. At 20 it's around 84 to 85%, and by 25 it's 97%. If anything, teenagers are having less sex than they were: both datasets show a modest fall in sexual activity among 15 to 17 year olds since the early 1990s.

The 3% who haven't by 25 aren't spread evenly across the population. Religious affiliation, some neurodivergent profiles and where you live all make a later start more likely. The virginity age calculator shows what proportion of people your age were in the same position.

How common are dry spells?

Much more common than anyone admits at a dinner party. There's no clinical definition of a dry spell, but the General Social Survey counts adults who report no sex in the past year, and in the latest data that's 15 to 20% of American adults. Among some groups it's far higher.

Roughly one man in three aged 18 to 24 reported no sex in the past year, up from about one in five in the late 1990s. Inside marriage the equivalent figure is the sexless marriage: 15 to 20% of married couples have sex fewer than ten times a year, which is the conventional clinical cut-off for the term.

Long gaps get talked about as if they were rare and slightly shameful, and the GSS shows they're a normal part of adult life for a large minority. The dry spell calculator shows how your gap compares with people your age, and the masturbation frequency calculator covers what people do in the meantime.

How common is the orgasm gap?

Very. Frederick and colleagues surveyed more than 52,000 adults for their 2018 paper in Archives of Sexual Behavior and found orgasm rates varied not just between men and women but across sexual orientations, and the gap between heterosexual men and heterosexual women turned out to be one of the most stable findings in the field.

Heterosexual men reported orgasming in 95% of partnered encounters and heterosexual women in 65%, thirty points apart. Lesbian women came in at 86%, which is the number that changes the argument: if women's bodies were the problem, the gap wouldn't close when the partner changes. It closes because what happens in bed changes.

The same research names what makes the difference for women: longer sex, more direct genital stimulation and oral sex, which between them explain much of the variation between orientations. Our female orgasm calculator puts your own rate against the survey figures.

How common is faking an orgasm?

Most women have, and a fair number of men. Muehlenhard and Shippee surveyed college students in 2010 and found 67% of women and 28% of men had faked an orgasm at least once, and a wider study looking back over whole sexual histories put the figure for women at 92%.

The reasons split two ways. Some are about the partner: not wanting to hurt their feelings, wanting them to feel good, wanting it to be over. Others are about the self: wanting to feel normal, avoiding embarrassment. Women more often give the partner-focused reasons and men, relatively, the self-focused ones.

People fake most with new partners and early on, and less as a relationship settles and they start saying what they want. The studies don't show that faking wrecks satisfaction, but it does predict lower orgasm rates over time for an obvious reason: it tells the partner they got it right when they didn't, so nothing changes. Our faking orgasm calculator compares your experience with the survey data.

What is the refractory period by age?

It lengthens with age, and it's the one topic here without a big national survey behind it. The refractory period is the time a man needs after ejaculating before he can get another erection and orgasm, and what we know comes from case studies, small laboratory studies and self-report, most usefully Levin's 2009 review in the Journal of Sexual Medicine.

In the late teens and early twenties it can be a matter of minutes. Through the thirties and forties, half an hour to several hours is typical, and from the sixties onwards 12 hours or more is common. Between individuals the range is wide, and arousal, the relationship, general health and mood all move it.

The mechanism is hormonal. Orgasm releases prolactin, which dampens dopamine and with it desire and erectile capacity, and as testosterone falls with age the recovery stretches out. The refractory period calculator has the full age-band figures and where yours sits among them.

How common is premature ejaculation?

Far less common than the number of men who worry about it. The International Society for Sexual Medicine defines premature ejaculation as ejaculating within about a minute of penetration, consistently, involuntarily and with distress, and by that definition it affects 1 to 3% of men.

Loosen the definition to men who feel they finish too fast but take 1 to 5 minutes, and the figure jumps to 20 to 30%. That gap is the whole story. Most men who think they have premature ejaculation are inside the ordinary range, and what they have is a comparison with a number that was never measured.

Waldinger's stopwatch study found about 2.5% of men ejaculating within a minute, which matches the clinical estimate, while distress about timing touches up to 30% of men at some point. The premature ejaculation calculator shows where your own timing sits against both the clinical threshold and the measured median.

How common are threesomes?

About one adult in ten has had one. The GSS and Natsal-3 both land at 10 to 15% lifetime prevalence, with the American figure around 10% and some broader sex surveys a little higher.

Men report more than women, bisexual adults and people who've had same-sex partners report more than exclusively heterosexual adults, and the 25 to 40 age group reports more than those younger or older.

Wanting one is far more common than having had one. Survey after survey finds a majority of adults curious about or interested in a threesome and a small minority who've done it, which fits a pattern that runs right through sex research: for almost every behaviour, fantasy outnumbers experience by a wide margin. The threesome calculator gives you a percentile for your age and sex.

What is the desire gap?

It's the difference between how much sex you want and how much your partner does, and it's nearly universal. Around 80% of long-term couples hit a meaningful mismatch at some point, so if you're in one you're not the exception, you're the rule.

The gap is about the difference, not the number. A couple having sex twice a month with both partners content has no desire gap at all, and a couple having sex weekly where one of them wants it daily has a serious one. Clinicians define it by the mismatch and how each person feels about it, never by frequency alone.

Gaps move. Studies that follow couples over years find desire rising and falling with stress, illness, hormones, children and how the relationship is going, and a gap on its own doesn't predict a break-up, though one that's left to turn into resentment or withdrawal does go with lower satisfaction over time. The desire gap calculator shows how common your situation is. A desire gap is also a different thing from asexuality, a stable orientation with little or no sexual attraction, which the asexual quiz explores across a four-zone spectrum.