Roughly 10 to 20 percent of married couples in the United States report having sex fewer than 10 times a year, which is the most widely used threshold for a “sexless” marriage. That means as many as one in five marriages fall into this category at any given time. The range depends on the study and how the question is asked, but the 10-times-per-year benchmark has become the standard reference point in sociology and sex research.
Where the 10-Times-Per-Year Threshold Comes From
There’s no clinical diagnosis for a sexless marriage. The “fewer than 10 times a year” definition comes from survey-based research and has been adopted by therapists and researchers as a practical cutoff. Some couples in this range are having sex a handful of times a year; others haven’t been intimate in years. The label groups them together, which is useful for population-level estimates but doesn’t capture how different the experience can feel from one couple to the next.
It’s also worth noting that these numbers come from self-reported surveys, and people tend to overestimate their sexual frequency. The real percentage of sexless marriages may be slightly higher than what the data shows.
Why Frequency Drops Over Time
Most couples have less sex the longer they’ve been together. That’s consistent across nearly every study on the topic. But there’s a difference between a gradual decline and a near-complete stop, and the reasons behind that stop tend to fall into a few categories.
Medical and Biological Causes
Chronic health conditions are one of the most common and least discussed drivers. Diabetes, heart disease, chronic pain, kidney disease, and thyroid problems can all suppress desire or make sex physically uncomfortable. For women, the hormonal shift during perimenopause and menopause often lowers libido as estrogen levels fall. For men, declining testosterone, whether from aging or a medical condition, plays a similar role.
Medications are another major factor. Antidepressants (particularly SSRIs), blood pressure drugs, antipsychotics, and chemotherapy drugs are all known to reduce sex drive as a side effect. This creates a frustrating situation where treating one health problem introduces another. Alcohol, smoking, and recreational drug use also suppress desire over time, with smoking specifically lowering testosterone levels.
Psychological and Relational Causes
Stress is the most straightforward explanation for many couples. Work pressure, financial strain, and sleep deprivation all compete for the same limited energy that sexual desire requires. Young children amplify this dramatically. New parents often experience a sharp drop in intimacy that can last years, not months, especially if the transition to parenthood creates resentment or an uneven division of labor.
Unresolved conflict is another common pattern. Couples who avoid difficult conversations or let small grievances accumulate often find that emotional distance turns into physical distance. Over time, some partners start to feel more like roommates than romantic partners. Rebuilding from that point requires addressing the relational dynamics first, not just the sex itself. Body image issues, a history of trauma, depression, and anxiety can also make intimacy feel unappealing or even threatening for one or both partners.
How Sexlessness Affects a Marriage
Not every sexless marriage is unhappy. Some couples arrive at low or no sexual frequency by mutual agreement and feel perfectly content. The distress comes when there’s a mismatch: one partner wants more intimacy and the other doesn’t, or both partners miss it but feel unable to bridge the gap. That mismatch tends to erode trust, self-esteem, and emotional closeness over time. The partner who wants more sex often feels rejected. The partner who doesn’t may feel pressured or guilty. Neither position is comfortable, and without direct communication, both people typically withdraw further.
Infidelity risk does increase in sexless marriages, though it’s not inevitable. Many couples stay faithful and simply live with the disconnect, sometimes for decades. The emotional toll of that silent compromise, however, can be significant even when it doesn’t lead to a dramatic outcome.
What Helps Couples Recover
Sex therapy has some of the strongest evidence behind it. Studies suggest that 60 to 70 percent of couples who pursue sex therapy report improved sexual function and satisfaction. Success rates for specific sexual dysfunctions can reach as high as 90 percent, depending on the issue. These numbers are encouraging, but they reflect couples who sought help, which already signals motivation and willingness to change.
For many couples, the first step isn’t therapy but a medical evaluation. If a medication is suppressing desire, switching to an alternative can make a noticeable difference. If low testosterone or menopause is a factor, hormone-related treatments are worth discussing with a doctor. Solving the medical piece sometimes resolves the problem entirely.
When the causes are relational, couples therapy focused on communication and emotional repair tends to be more useful than jumping straight to sexual exercises. Rebuilding physical intimacy usually requires rebuilding emotional safety first. That process isn’t quick, but the majority of couples who commit to it report meaningful improvement, both in their sex lives and in how connected they feel overall.
What “Normal” Actually Looks Like
The average married couple in the U.S. reports having sex about once a week, though that number varies widely by age, health, relationship length, and the presence of children. Comparing yourself to an average is less useful than asking whether both you and your partner feel satisfied with the frequency you have. A couple having sex twice a month who are both happy with that arrangement is in better shape than a couple having sex weekly where one person feels constantly rejected.
The 10-to-20 percent statistic is a snapshot. Many couples move in and out of sexless periods depending on life circumstances. A stretch of low intimacy after a new baby, a health crisis, or a career upheaval doesn’t mean a marriage is permanently sexless. What tends to make the difference is whether both partners can talk about it openly and whether they’re willing to address the underlying cause rather than just the symptom.