There’s no magic number, but research points to a clear pattern: couples who have sex about once a week report the highest levels of happiness and relationship satisfaction. Beyond that frequency, the benefits plateau. A landmark study from the Society for Personality and Social Psychology found that while happiness increased as couples moved from rarely having sex to once a week, there was no additional boost from having sex more often than that.
That said, once a week is a benchmark, not a prescription. What matters more than hitting a specific number is whether both partners feel satisfied with their sex life.
What Most Couples Actually Report
If you feel like you’re not having as much sex as everyone else, the reality is probably more reassuring than you think. A 2020 study broke down sexual frequency by age group, looking at who had sex weekly or more. Among 25- to 34-year-olds, about half of men and 54% of women reported weekly sex. The numbers were nearly identical for 35- to 44-year-olds. Younger adults (18 to 24) actually reported slightly lower rates for men, with only 37% hitting weekly frequency, likely reflecting a higher share of single people in that group.
A 2025 study paints a broader picture across the lifespan: people in their 20s average roughly 80 sexual encounters per year (about once every four to five days), while by the 60s that drops to around 20 times per year. These are averages, meaning plenty of couples fall above or below these numbers and feel perfectly fine about it.
Sex Frequency Is Declining Overall
One reason you might be searching this question: a nagging sense that your sex life has slowed down. You’re not imagining it, and you’re not alone. Americans across all age groups are having less sex than in previous decades. By the early 2010s, the average American was having sex about nine fewer times per year compared to the late 1990s.
The shift is especially pronounced among younger adults. The number of men aged 18 to 24 reporting no sexual activity in the past year jumped from about 19% in 2000 to 31% by 2018. And the share of young adults with zero sexual partners since turning 18 more than doubled between those born in the 1960s and those born in the 1990s. Screens, longer work hours, dating app fatigue, and rising rates of anxiety all likely play a role, though researchers are still untangling the causes.
The Once-a-Week Happiness Threshold
The most widely cited finding on this topic comes from researcher Amy Muise, who analyzed data from over 30,000 people. Couples reported increasing relationship satisfaction as their sexual frequency rose, but only up to once a week. After that, the curve flattened. Couples having sex three or four times a week weren’t measurably happier than those having sex once.
This doesn’t mean more sex is bad. It means that chasing a higher number purely because you think it should make you happier probably won’t deliver. Quality, connection, and mutual desire carry more weight than frequency alone. If both partners genuinely want sex four times a week and enjoy it, that’s great. But if one partner is pushing for more because they feel they “should,” the research suggests that pressure is misplaced.
Physical Benefits of Regular Sex
Regular sexual activity does more than strengthen a relationship. People who have sex once or twice a week show immune antibody levels about 30% higher than those who are abstinent, suggesting a modest but real boost to immune function. During sex, heart rate rises by 20 to 80 beats per minute and blood pressure increases temporarily, giving the cardiovascular system a workout similar to moderate exercise. A typical session burns around 85 calories, or roughly 3.6 calories per minute.
Orgasm also triggers a release of oxytocin, a hormone that helps dampen the body’s stress response. Oxytocin reduces levels of cortisol, the primary stress hormone, and lowers feelings of anxiety and perceived stress. Over time, regular intimacy can recalibrate how your body reacts to stressful situations, making you more resilient rather than just temporarily relaxed.
When You and Your Partner Want Different Amounts
Mismatched desire is one of the most common issues couples face, and it rarely means something is wrong with either person. Libido fluctuates with stress, sleep, medication, hormones, aging, and life circumstances like new parenthood or career changes. The gap between what each partner wants is normal. How you handle it is what matters.
Researchers who studied how real couples navigate desire differences identified several practical strategies:
- Talk about it without blame. Frame the conversation around reassurance and curiosity rather than criticism. Ask what’s influencing your partner’s desire right now, and share what’s affecting yours.
- Broaden what counts as intimacy. When one partner isn’t in the mood for intercourse, physical closeness like cuddling, massage, or showering together can maintain the sense of connection both people need.
- Explore alternatives together. Non-penetrative sexual activity, mutual touch, or other forms of physical pleasure can satisfy the higher-desire partner without pressuring the other into something they don’t want.
- Accept solo sexuality as healthy. Masturbation isn’t a failure of the relationship. Many couples in healthy, satisfying partnerships use it to bridge the gap between different desire levels.
One strategy that shows up in research but deserves a caveat: some people practice “maintenance sex,” choosing to engage even when desire is low because they value what sex does for the relationship. This can work when it comes from a genuine personal decision, but it crosses into harmful territory if one partner feels coerced or resentful. The line between flexibility and obligation is important to recognize.
Why Your Number Will Change Over Time
Sexual frequency in long-term relationships is not static. New couples often start with high frequency driven by novelty and infatuation, then settle into a lower but stable rhythm within the first year or two. Major life transitions, particularly having a baby, recovering from illness, or navigating work stress, can drop frequency significantly for months or even years.
People in their 20s averaging sex every four to five days and people in their 60s averaging every couple of weeks are both within the range of normal. The decline isn’t a sign of failure. It reflects real changes in energy, health, hormone levels, and how couples express closeness as relationships mature. Many long-term couples find that sex becomes less frequent but more emotionally meaningful over time.
The most useful question isn’t “how often should we have sex?” but “are we both reasonably satisfied with how things are?” If the answer is yes, your number is the right one, whether that’s five times a week or twice a month.