Can a Lack of Sex Affect Men’s Health? What Science Actually Shows

For centuries, sexual activity has been considered an important part of human relationships, intimacy, and overall quality of life. But an important question remains: what happens to a man’s health when sexual activity or sexual function declines?

Research has found interesting connections between sexual health and physical, mental, cardiovascular, and cognitive health. However, there is an important distinction: these studies generally show associations, not proof that simply having less sex directly causes cancer, heart disease, or cognitive decline.

In many cases, a reduction in sexual desire or erectile function may actually be an early sign of another underlying health problem. Understanding that distinction is essential.

1. Start With the Difference Between Sexual Activity and Sexual Function

A man can have little or no sex for many different reasons. He may be single, intentionally abstinent, in a relationship without sexual activity, or simply have a low interest in sex. None of these situations automatically means something is wrong with his health.

Sexual function is different.

Problems such as reduced sexual desire, difficulty getting or maintaining an erection, or changes in sexual satisfaction can sometimes accompany conditions such as cardiovascular disease, diabetes, depression, medication side effects, hormonal problems, or sleep disorders.

Therefore, scientists are particularly interested when a man experiences a new or unexplained decline in sexual desire or function.

2. What Did the Large ELSA Study Find?

One important study examined data from the English Longitudinal Study of Ageing (ELSA). Researchers analyzed 2,577 men and 3,195 women aged 50 and older and examined changes in sexual activity and function alongside later health outcomes.

The researchers found several notable associations among men.

Men who reported a decline in sexual desire had higher odds of developing a limiting long-standing illness during follow-up. They also had higher odds of subsequently reporting a cancer diagnosis.

Men who reported declining frequency of sexual activity were more likely to experience deterioration in their self-rated health and to develop a limiting long-standing illness.

Erectile dysfunction showed another particularly interesting relationship. Men experiencing erectile dysfunction had higher odds of later cancer, coronary heart disease, and fair or poor self-rated health.

These findings are important, but they should not be interpreted as saying “not having sex causes cancer.” The study was observational. It found that sexual health changes were associated with later health outcomes.

That means sexual changes may sometimes be a warning sign rather than the direct cause.

3. Why Could Erectile Dysfunction Be Important?

Erections depend on healthy blood vessels, nerves, hormones, and psychological well-being.

Because the blood vessels involved in erectile function are relatively small, changes in vascular health may sometimes become noticeable through erectile difficulties before other cardiovascular symptoms become obvious.

High blood pressure, diabetes, obesity, smoking, high cholesterol, cardiovascular disease, stress, depression, and certain medications can all affect erectile function.

Therefore, a persistent new erectile problem deserves attention—not necessarily because it means a serious disease is present, but because it can provide an opportunity to discuss overall health with a doctor.

4. What About the Brain?

Sexual health has also been studied in relation to cognitive function.

A 2023 study in The Journal of Sex Research examined 1,683 partnered older adults using data from the National Social Life, Health, and Aging Project. Researchers looked at sexual frequency, sexual quality, physical pleasure, emotional satisfaction, and cognitive performance.

The results were more complicated than the claim that “lack of sex causes cognitive decline.”

Overall, sexuality was not consistently associated with later cognitive function across the entire sample. However, patterns differed according to age and sex. Among adults aged 62–74, better sexual quality was associated with better cognitive functioning, while among adults aged 75–90, more frequent sex was associated with better cognitive functioning. Physical pleasure was also associated with better cognitive functioning among men.

This suggests an interesting relationship, but researchers still need more evidence to determine exactly what causes what.

5. Sleep and Sexual Health Are Connected Too

Sleep is another important piece of the puzzle.

Research using ELSA data examined 2,568 men and 1,376 women aged 50 and older. The study found that men reporting moderate sleep quality had higher odds of experiencing erectile difficulties compared with men reporting high sleep quality.

But the researchers specifically noted an important limitation: the study was cross-sectional, meaning it could not determine the direction of the relationship.

In simple terms, poor sleep might contribute to sexual problems, sexual problems might be associated with poorer sleep, or another health factor might contribute to both.

This is why sleep should be considered an important part of sexual and general health rather than assuming that one problem automatically causes the other.

6. What Could Be Happening Inside the Body?

Scientists have proposed several possible explanations for the connection between sexual health and overall health.

Sexual activity can involve physical exertion, increased heart rate, emotional connection, relaxation, and pleasurable experiences. These effects may contribute to general well-being.

However, it would be incorrect to say that sex is a replacement for exercise or that men must have sex a certain number of times to remain healthy.

Regular physical activity, for example, has much stronger evidence for protecting cardiovascular and metabolic health.

Hormones may also be involved. Testosterone plays important roles in sexual desire, muscle function, bone health, and other physiological processes. But low testosterone can itself be associated with health problems, aging, obesity, certain medications, and other conditions.

Therefore, simply having less sex does not automatically mean testosterone has fallen.

7. Mental Health Matters

Sexuality is also connected with psychological well-being.

Relationship difficulties, loneliness, depression, anxiety, chronic stress, and low self-esteem can reduce sexual desire or sexual activity. At the same time, relationship intimacy and positive sexual experiences can contribute to emotional well-being for some people.

This creates another possible cycle.

For example, stress may reduce sexual desire. Reduced intimacy may create relationship tension. Relationship tension may increase stress, which can further affect sleep, mood, and sexual function.

Breaking this cycle may require addressing the underlying emotional or relationship problem rather than simply trying to increase sexual frequency.

8. What Can Men Do If They Are Not Sexually Active?

The good news is that men do not need to have sex simply to protect their health.

There are many evidence-based ways to support cardiovascular, mental, hormonal, and cognitive health.

Exercise Regularly

Walking, cycling, swimming, resistance training, and other forms of physical activity can improve cardiovascular fitness and circulation.

Aim for regular movement throughout the week rather than treating sexual activity as a substitute for exercise.

Prioritize Sleep

Poor sleep can affect mood, energy, hormones, and sexual function. Establishing a consistent bedtime, reducing excessive screen use before bed, and addressing persistent sleep problems can be helpful.

If loud snoring, breathing interruptions, extreme daytime sleepiness, or persistent insomnia occurs, medical evaluation may be appropriate.

Eat a Balanced Diet

There is no magic food that guarantees healthy testosterone levels.

Instead, focus on a balanced eating pattern containing vegetables, fruits, whole grains, legumes, fish or other protein sources, nuts, and healthy fats.

Zinc and other nutrients are important for normal bodily function, but taking large amounts of supplements without a demonstrated deficiency is not necessarily beneficial.

Maintain Healthy Relationships

Emotional connection does not have to come exclusively from sexual activity.

Friendships, family relationships, social activities, hobbies, volunteering, and meaningful conversations can all provide connection and reduce isolation.

Manage Stress

Chronic stress can affect sleep, mood, blood pressure, and sexual function.

Walking, breathing exercises, meditation, hobbies, social interaction, and professional counseling can all be useful strategies.

9. When Should a Man Talk to a Doctor?

A sudden or persistent change in sexual desire or erectile function deserves attention, particularly when it occurs alongside other changes in health.

A doctor may review blood pressure, blood sugar, cholesterol, medications, lifestyle factors, mental health, sleep, and—when appropriate—hormonal factors.

This is especially important when erectile problems appear together with chest discomfort, shortness of breath, unusual fatigue, or other cardiovascular symptoms.

The goal is not simply to restore sexual function. It is to determine whether the sexual change is revealing another health issue that deserves treatment.

10. The Bottom Line

The science does not show that simply having less sex directly causes cancer, heart disease, or dementia.

What research does show is that sexual health and overall health are closely connected. Declining sexual desire, reduced sexual activity, and erectile dysfunction can sometimes accompany or predict poorer health outcomes, particularly among older adults.

Research has also found relationships between sexual well-being, cognitive function, and sleep, although these relationships are complex and cannot yet be reduced to a simple cause-and-effect explanation.

The most useful takeaway is therefore not that every man needs more sex. Instead, a new and unexplained change in sexual function can be a reason to pay closer attention to overall health.

Regular exercise, quality sleep, nutritious food, stress management, social connection, and appropriate medical care remain important foundations of men’s health—whether or not someone is sexually active.

This article is for general educational purposes and does not replace individualized medical advice from a qualified healthcare professional.