A man’s sexual activity can decline or stop entirely for a wide range of reasons, from hormonal shifts and chronic health conditions to medication side effects, psychological factors, and simple lifestyle changes like poor sleep. Often, several of these overlap. Nearly 31% of men aged 18 to 24 reported no sexual activity in the past year in recent U.S. survey data, and that number has been climbing, so this is far from uncommon.
Chronic Health Conditions
Heart disease, diabetes, and high blood pressure are some of the most reliable predictors of reduced sexual function in men. These conditions damage blood vessels and nerves over time, directly interfering with the physical mechanics of arousal and erection. In a 2024 population survey, 82.4% of men reporting impairment from heart disease also had erectile dysfunction. For diabetes, that figure was 81%, and for high blood pressure, 77.8%.
The connection is straightforward: erections depend on healthy blood flow. Conditions that stiffen or narrow blood vessels make that harder. Diabetes adds nerve damage on top of vascular problems, which can dull sensation and make arousal more difficult to sustain. Inflammatory conditions like rheumatoid arthritis also showed high rates of erectile dysfunction (about 79%), likely through a combination of chronic pain, fatigue, and the medications used to manage them.
What makes chronic disease tricky is that the sexual effects often layer on top of each other. A man with high blood pressure might also be dealing with the fatigue of managing a long-term condition, the mood effects of feeling unwell, and the side effects of his medication, all pulling in the same direction.
Low Testosterone
Testosterone is the primary hormone driving male sexual desire. When levels drop below roughly 3 ng/ml, men commonly experience reduced libido, difficulty with erections, fatigue, and poor concentration. This is sometimes called late-onset hypogonadism, and it becomes more common with age.
That said, clinically significant testosterone deficiency is less widespread than many people assume. The European Male Aging Study, which tested nearly 3,000 men between ages 40 and 79, found that only about 2.1% met the full criteria for late-onset hypogonadism, which requires both low blood levels and at least three sexual symptoms like reduced desire, fewer morning erections, or erectile dysfunction. Testosterone naturally declines with age, but a modest dip doesn’t necessarily cause problems. It’s the combination of measurably low levels and noticeable symptoms that matters.
Medications That Reduce Desire
Antidepressants are one of the most common medication-related causes of sexual problems in men. SSRIs, the class of antidepressants prescribed most frequently, cause sexual side effects in an estimated 25% to 73% of people who take them. Some specific drugs push toward the higher end of that range. Men taking these medications often experience a significant drop in desire, not just difficulty with physical performance. Research has found that men on SSRIs report greater impairment in drive and desire compared to women on the same drugs.
The reason is partly chemical. About 80% of the body’s serotonin, the brain chemical SSRIs boost, is active outside the brain. When serotonin levels rise in the body’s peripheral tissues, it directly reduces sensation in reproductive structures and can interfere with erections, ejaculation, and orgasm. So the same mechanism that helps with depression can simultaneously dampen nearly every phase of the sexual response.
Blood pressure medications, certain prostate drugs, and some anti-anxiety medications can also contribute. If sexual problems started around the same time as a new prescription, the medication is a likely factor. Switching to a different drug within the same class, or adjusting the dose, often helps.
Psychological and Relationship Factors
Depression itself, separate from any medication, is strongly linked to sexual inactivity. In population data, about two-thirds of men dealing with depression also reported erectile dysfunction. Depression blunts pleasure and motivation broadly, and sexual desire is rarely spared.
Anxiety, stress, and relationship conflict all play roles too. Performance anxiety can create a self-reinforcing cycle: a man has difficulty once, worries about it happening again, and that worry itself makes arousal harder. Over time, some men avoid sexual situations entirely rather than risk the discomfort. Grief, major life transitions, work burnout, and unresolved trauma can all quietly erode sexual interest without a man fully recognizing the connection.
Sleep Deprivation
Poor sleep has a surprisingly direct effect on sexual function. In a controlled study of young, healthy men, restricting sleep to five hours per night for just one week reduced daytime testosterone levels by 10% to 15%. That’s a significant drop, especially considering these were men in their twenties with no underlying health problems.
Sleep apnea, a condition where breathing repeatedly stops during sleep, is also associated with reduced testosterone. Many men with sleep apnea don’t realize they have it. They just know they’re tired, unfocused, and uninterested in sex. The symptoms of low testosterone and sleep deprivation overlap almost perfectly: low energy, poor concentration, increased daytime sleepiness, and reduced libido.
Rising Rates of Sexual Inactivity
Sexual inactivity among younger men has increased notably over the past two decades. Between 2000 and 2018, the share of men aged 18 to 24 reporting no sexual activity in the past year rose from about 19% to 31%. Among men 25 to 34, it roughly doubled, going from 7% to 14%. For men 35 to 44, rates stayed largely the same.
Researchers have pointed to several possible explanations for the trend among younger men, including more time spent on screens and social media, delayed milestones like moving out of a parent’s home, and shifting social dynamics around dating. Economic pressures and rising rates of anxiety and depression in younger adults likely contribute as well. The trend predates the pandemic, so it reflects broader cultural and lifestyle shifts rather than a single event.
When Multiple Causes Overlap
In practice, sexual inactivity rarely traces back to one clean cause. A man who sleeps poorly may gain weight, which raises his risk for diabetes and high blood pressure, which get treated with medications that further dampen desire, all while the stress of managing his health erodes his mood. Each factor reinforces the others.
This is actually useful to understand, because it means addressing even one piece of the puzzle can create positive momentum in the other direction. Improving sleep, getting more physically active, or adjusting a problematic medication can each shift the balance enough to make a noticeable difference. The body’s sexual response system doesn’t need every condition to be perfect. It just needs enough of the basics working in its favor.