Masturbation is a normal, generally healthy sexual activity. The majority of adult men and women do it, and the physical effects are overwhelmingly neutral to positive. There’s no credible evidence that it causes physical harm, and a growing body of research links regular ejaculation to specific health benefits including lower prostate cancer risk and temporary boosts to immune function.
Hormones Released During Orgasm
Sexual arousal and orgasm trigger a cascade of hormones. The main players are endorphins (your body’s natural painkillers), dopamine (tied to pleasure and reward), oxytocin (linked to bonding and relaxation), and prolactin (which promotes a feeling of satisfaction). After orgasm, prolactin levels rise while dopamine and oxytocin drop back down, which is partly why you feel relaxed and content afterward.
A pilot study published in Basic and Clinical Andrology found that masturbation also affects testosterone. Specifically, it counteracted the natural drop in free testosterone that happens over the course of the day in young men. This doesn’t mean masturbation dramatically raises testosterone, but it does appear to have a modest stabilizing effect on levels that would otherwise decline as the day goes on.
Prostate Cancer Risk
One of the most cited benefits of frequent ejaculation relates to prostate health. A large study published in European Urology followed men over multiple decades and found that those who ejaculated 21 or more times per month had a 19 to 22% lower risk of prostate cancer compared to men who ejaculated 4 to 7 times per month. The protective association held for men in their 20s and men in their 40s. For low-risk prostate cancer specifically, ejaculating 13 or more times per month was linked to a 25 to 28% risk reduction.
The mechanism isn’t fully understood, but one theory is that frequent ejaculation helps flush out potentially harmful substances from the prostate gland before they can accumulate.
Immune Function
Sexual arousal and orgasm appear to temporarily activate parts of the innate immune system. Research published in the journal Neuroimmunomodulation found that orgasm increased the total number of white blood cells circulating in the blood, particularly natural killer cells, which are your body’s first responders against viruses and abnormal cells. Other immune components like T cells and B cells weren’t affected. This suggests a short-term immune boost rather than a lasting change, but it’s one more data point in favor of the activity being physiologically benign or mildly beneficial.
Stress Relief and Mental Health
The oxytocin released during orgasm helps lower cortisol, your primary stress hormone, by reducing the brain signals that trigger cortisol production in the first place. This is why masturbation often leaves people feeling calmer. Beyond the chemistry, it can also serve as a form of body awareness and self-care. Becoming familiar with your own body and what feels good tends to improve self-esteem and sexual confidence over time.
Sleep Effects
Many people masturbate before bed to help fall asleep, and the perception that it helps is widespread. A diary-based study found that both men and women report improved sleep quality and faster sleep onset after orgasm. However, when the researchers tracked sleep patterns more precisely, only partnered sex with orgasm was associated with measurably faster sleep onset and higher sleep quality. Masturbation with orgasm didn’t produce the same statistically significant improvement in the diary data, though many participants still perceived a benefit. The relaxation from prolactin release and cortisol reduction likely still plays a role, even if the measurable effect is smaller than with partnered sex.
Does It Cause Erectile Dysfunction?
No. A study examining the relationship between masturbation, pornography use, and erectile dysfunction found that masturbation frequency was only weakly and inconsistently related to erectile function. The factors that actually predicted erectile problems were the ones doctors have long recognized: age, anxiety and depression, chronic medical conditions, and low sexual interest. Pornography use was similarly unrelated to erectile function.
That said, the researchers noted they couldn’t rule out that heavy reliance on pornography combined with very frequent masturbation might affect sexual performance with a partner in some particularly vulnerable individuals, such as younger, less experienced men. This isn’t about masturbation causing physical damage to the penis. It’s about psychological conditioning, where someone becomes so accustomed to a specific type of stimulation that partnered sex feels different. If you notice this pattern, simply changing your habits usually resolves it.
Physical Side Effects
The only real physical risk is skin irritation from friction, which is easily prevented with lubricant. If you do experience soreness or chafing, take a break and let the area heal. There’s no evidence that masturbation causes long-term desensitization, infertility, or any structural harm to the genitals.
How Often Is Normal?
There’s a wide range. In a nationally representative U.S. survey, more than half of men aged 16 to 59 reported masturbating in the past month, with about 36% doing so at least once a week over the prior year. For women, about 20% reported past-month masturbation across all age groups, with rates exceeding 40% only among women in their 20s. Around 9% of women masturbated weekly.
There is no specific number that’s “too much” or “too little.” Frequency varies enormously based on age, sex drive, relationship status, and personal preference. The question isn’t how often, but whether it’s causing problems in your life.
When It Becomes a Problem
The World Health Organization recognizes compulsive sexual behavior disorder in its diagnostic manual, characterized by a persistent inability to control intense sexual urges over six months or more, resulting in real consequences. The key markers are:
- Loss of priorities: sexual activity becomes the central focus of your life, crowding out health, relationships, and responsibilities
- Repeated failed attempts to cut back or stop
- Continuing despite consequences, such as relationship disruption, job performance issues, or negative health effects
- No longer enjoying it but feeling compelled to continue anyway
Importantly, the diagnostic guidelines explicitly state that a high sex drive by itself does not qualify. If you masturbate frequently but it isn’t impairing your life, that’s not a disorder. The guidelines also note that guilt or shame stemming from moral or religious beliefs about masturbation, on its own, does not warrant a diagnosis. Feeling bad about it because you were taught to feel bad about it is different from having a compulsive behavior problem.