Sex statistics: what the research actually says

How often do people have sex?

The General Social Survey (GSS), which has tracked sexual frequency across more than 26,620 US adults since 1972, provides the most comprehensive longitudinal data on this question. Frequency declines steadily with age but remains higher than most people assume for younger adults.

US adults in their 20s average 6.7 sexual encounters per month, roughly 80 times per year. This drops to 5.5 per month for the 25 to 34 age group and falls to 3.2 by the 45 to 54 range. UK data from Natsal-3, based on 15,162 British adults, shows consistently lower frequencies across all age groups.

A widely cited 2017 paper by Twenge, Sherman, and Wells found that Americans reported having sex approximately 9 fewer times per year in the early 2010s than in the late 1990s, a statistically significant decline that persists after controlling for age, marital status, and health. The most striking finding in recent GSS data: nearly 1 in 3 US men aged 18 to 24 reported zero sexual activity in the past year. For your own percentile, use the frequency calculator. For partnership-specific data, see sex frequency in married couples.

How long does sex last?

The most rigorous published study on sexual duration is Waldinger et al. (2005), which used stopwatch timing across 500 couples in five countries over four weeks. The study did not rely on self-report, which typically inflates estimates. The median intravaginal ejaculatory latency time was 5.4 minutes, with a wide range from 0.55 minutes to 44.1 minutes.

A follow-up survey of the Society for Sex Therapy and Research (SSTAR) asked therapists to define clinically adequate, desirable, and problematic durations. The consensus: under 2 minutes is too short, 3 to 7 minutes is adequate, 7 to 13 minutes is desirable, and over 13 minutes is too long. The measured median of 5.4 minutes places typical sex firmly in the "adequate" range, not the "desirable" range.

Self-reported estimates in other surveys tend to cluster around 10 to 20 minutes, roughly doubling the measured reality. Use the duration calculator to compare your own figures against the population distribution.

How many sexual partners is normal?

CDC NSFG data for the 2015 to 2019 survey cycle provides the most recent nationally representative estimate for US adults. The median lifetime partner count is 4 for women and 6 for men, but these figures mask substantial variation by age, generation, and religion.

The distribution of partner counts is heavily right-skewed. Most adults have relatively few partners, while a small minority report very high counts that pull the mean far above the median. This matters when interpreting any claim about "average" partner counts: if a figure seems surprisingly high, check whether it refers to the median or the mean. The median is the more honest measure.

Partner counts accumulate over time, meaning a 25-year-old with a count of 5 is not directly comparable to a 50-year-old with the same figure. For a personalised percentile, use the partner count calculator. For context on how body count relates to relationship quality, see the body count calculator.

What age do people first have sex?

The median age of first penile-vaginal sex is 17 in both the UK (Natsal-3, 2013) and the US (CDC NSFG, 2015 to 2019), a figure that has remained stable across recent cohorts. Despite cultural narratives about earlier sexual debut, the population-level median has not shifted substantially in either country over the past two decades.

By age 16, approximately 35 to 38% of young people in both countries have had sex. By age 20, that figure rises to around 84 to 85%. By 25, 97% of adults report having had sex. One clear trend in both datasets is a modest decline in teen sexual activity among 15 to 17 year olds since the early 1990s.

The 3% who have not had sex by age 25 are not uniformly distributed: higher rates of delayed debut are associated with religious affiliation, certain neurodivergent profiles, and geographic region. For a personalised comparison, use the virginity age calculator.

How common are dry spells?

The term "dry spell" has no clinical definition, but the General Social Survey provides the most comprehensive data on zero-sexual-activity periods among US adults. In the most recent cross-sectional data, 15 to 20% of US adults reported no sex in the past year. This figure rises sharply among certain demographic groups.

Among men aged 18 to 24, approximately 1 in 3 reported no sexual activity in the past year, a rate that has risen significantly since the late 1990s, when the comparable figure was closer to 1 in 5. The sexless marriage is a related phenomenon: between 15 and 20% of married couples report having sex fewer than 10 times per year, the conventional clinical threshold for a sexless marriage.

Extended inactivity is substantially more common than the cultural norm implies. Reported dry spells are often dismissed as exceptional, but the GSS data shows they are a normal part of adult sexual experience for a significant minority. Use the dry spell calculator to see how your gap compares to the population. For data on solo sexual behaviour during periods of reduced partnered activity, see the masturbation frequency calculator.

How common is the orgasm gap?

Frederick et al. (2018) published the most comprehensive analysis of orgasm rates by sexual orientation in Archives of Sexual Behavior. The study surveyed over 52,000 adults and found substantial variation not only between genders but across sexual orientation groups. The gender orgasm gap, the difference in orgasm rate between heterosexual men and heterosexual women, is one of the most consistent findings in sexual psychology research.

Heterosexual men report the highest orgasm rate (95%) during partnered sex. Heterosexual women report the lowest rate (65%), a gap of 30 percentage points. Lesbian women (86%) orgasm at substantially higher rates than heterosexual women, a finding interpreted as evidence that the heterosexual orgasm gap is primarily behavioural rather than anatomical: it reflects what sexual scripts prioritise.

Research also documents specific factors associated with higher female orgasm rates: longer duration, more genital stimulation, and oral sex. These factors account for a significant portion of the orientation-based variation. For individual context, see the female orgasm calculator.

How common is faking an orgasm?

Muehlenhard and Shippee (2010) surveyed college students and found 67% of women and 28% of men reported faking an orgasm at some point. A wider retrospective study found 92% of women reported having faked at least once across their sexual history.

The motivations documented in the research fall into two main categories: partner-focused reasons (not wanting to hurt the partner's feelings, wanting sex to end, wanting to please the partner) and self-focused reasons (wanting to feel normal, avoiding embarrassment). Partner-focused reasons are more commonly cited by women; self-focused reasons are relatively more common among men.

Faking is more common early in relationships and with new partners, declining in established relationships where communication is higher. The research does not show that faking is necessarily harmful to relationship satisfaction, but it does predict lower orgasm rates over time, since it removes the feedback signal that would lead to behavioural adjustment by the partner. Use the faking orgasm calculator to compare your experience to the data.

What is the refractory period by age?

The refractory period is the minimum time required after ejaculation before a man can achieve another erection and orgasm. Unlike most sexual norms covered on this page, there is no large-scale nationally representative survey of refractory periods. Clinical data comes primarily from case studies, small laboratory studies, and self-report surveys, most notably Levin (2009) in the Journal of Sexual Medicine.

The duration increases reliably with age. Young men in their late teens and early 20s may experience refractory periods of minutes. By the 30s and 40s, 30 minutes to several hours is typical. By the 60s and beyond, periods often extend to 12 hours or more. These figures vary considerably between individuals and are influenced by arousal level, relationship quality, health status, and psychological factors.

The mechanism is hormonal: prolactin released during orgasm suppresses dopamine activity, reducing sexual motivation and erectile capacity. As testosterone declines with age, recovery takes longer. For a personalised comparison and full age-band data, use the refractory period calculator.

How common is premature ejaculation?

The International Society for Sexual Medicine (ISSM) defines premature ejaculation (PE) as ejaculation occurring within approximately 1 minute of penetration, consistently and involuntarily, causing distress. By this strict clinical criterion, prevalence is estimated at 1 to 3% of the male population.

A broader definition, sometimes called patient-reported or subjective PE, includes men who feel they ejaculate too quickly but do so in 1 to 5 minutes. Using this criterion, prevalence estimates range from 20 to 30% of men. The gap between clinical and self-reported prevalence is significant: the majority of men who report PE concerns do not meet the clinical definition.

Stopwatch data from Waldinger et al. (2005) found roughly 2.5% of the sample ejaculated within 1 minute, broadly consistent with clinical prevalence estimates. Subjective distress about ejaculation timing is substantially higher, affecting up to 30% of men at some point in their lives. Use the premature ejaculation calculator to see where your duration sits relative to clinical thresholds.

How common are threesomes?

Survey data from the GSS and Natsal-3 consistently finds that approximately 10 to 15% of adults report having had a threesome at some point. US data from the GSS puts lifetime prevalence at around 10%, while some broader surveys of sexual experience report slightly higher figures.

Variation by gender and sexual orientation is significant. Men consistently report higher lifetime prevalence than women, and adults who identify as bisexual or who have had same-sex partners report higher rates than exclusively heterosexual adults. Prevalence is also higher among adults aged 25 to 40 than among older or younger age groups.

The gap between interest and experience is notable. Several surveys find that a majority of adults report curiosity about or desire for a threesome, while the proportion who have actually experienced one is considerably lower. This is consistent with the broader finding across sexual research that fantasies and reported desires substantially outnumber actual experiences for most categories of sexual behaviour. Use the threesome calculator for a personalised percentile.

What is the desire gap?

The desire gap refers to a mismatch in sexual desire between partners in a long-term relationship, where one partner wants sex significantly more or less frequently than the other. Research consistently finds this is not an edge case: approximately 80% of long-term couples experience a meaningful desire discrepancy at some point.

The desire gap is not primarily a frequency problem but a mismatch problem. A couple having sex twice per month can have no desire gap if both partners are satisfied with that frequency. A couple having sex weekly can have a significant desire gap if one partner wants sex daily. The clinical definition focuses on subjective discrepancy rather than absolute frequency.

Desire gaps are not permanent. Longitudinal research shows they fluctuate with life events, stress, hormonal changes, and relationship quality. They are also not inherently predictive of relationship breakdown, though unresolved discrepancies that generate resentment or withdrawal are associated with lower relationship satisfaction over time. Use the desire gap calculator for context on how common your situation is. Desire-gap mismatch should also be distinguished from asexuality, a stable sexual orientation characterised by little or no sexual attraction, which the asexual quiz explores on a four-zone spectrum.