Masturbation is the self-stimulation of one’s genitals for sexual pleasure, sometimes to the point of orgasm. It is one of the most common sexual behaviors across virtually every age group, culture, and gender, and research over the past several decades has examined its effects on the body, mind, and relationships in considerable detail. Despite centuries of myth and moral panic surrounding the practice, the scientific picture is largely reassuring and, in some areas, surprisingly positive.
How Common Is It
Masturbation is widespread at every stage of life. Among U.S. adolescents, surveys show clear gender differences that emerge early: roughly 63 percent of 14-year-old males report having masturbated at least once, rising to about 80 percent by age 17, while for females the range runs from about 43 percent at age 14 to 58 percent at 17.1Archives of Pediatrics & Adolescent Medicine. Prevalence, Frequency, and Associations of Masturbation With Partnered Sexual Behaviors Among US Adolescents At the other end of the age spectrum, a study of adults aged 60 and older across four European countries found that roughly 40 to 65 percent of older men and 27 to 40 percent of older women had masturbated in the preceding month.2PubMed Central. Prevalence of Masturbation and Associated Factors Among Older Adults in Four European Countries In other words, this is not a behavior that people age out of. It persists across the lifespan, though frequency and context shift with health, relationship status, and hormonal changes.
What Happens in Your Body During and After
Self-stimulation triggers much the same cascade of neurochemical events as partnered sex. During arousal and especially at orgasm, oxytocin levels in the blood rise sharply. A systematic review covering decades of research found that every study measuring oxytocin around orgasm or ejaculation reported an increase, whether the stimulus was intercourse or self-stimulation.3PubMed Central. How Relevant is the Systemic Oxytocin Concentration for Human Sexual Behavior? A Systematic Review Oxytocin is often associated with bonding and relaxation, which helps explain the calm, drowsy feeling many people experience afterward.
Prolactin also surges after orgasm in both men and women.4PubMed. Prolactinergic and dopaminergic mechanisms underlying sexual arousal and orgasm in humans Researchers believe this prolactin spike may contribute to the feeling of sexual satiation, the sense that you are “done” for the time being. It feeds back on dopamine circuits in the brain, temporarily dialing down sexual drive. This is part of why there is a refractory period after orgasm, especially in men.
One small but interesting study looked at what happens to the immune system after sexual arousal and orgasm in men. Natural killer cells, a type of white blood cell involved in fighting infections, increased in circulation after orgasm, while other immune cell populations stayed roughly the same.5PubMed. Effects of sexual arousal on lymphocyte subset circulation and cytokine production in man That single study is not enough to claim masturbation “boosts your immune system,” but it points to the body responding to sexual arousal as a form of mild physiological activation.
The Testosterone Question
One of the most persistent claims online is that masturbation drains testosterone and that abstaining will raise it. The evidence does not support this in any meaningful way. A controlled pilot study that tracked hormone levels throughout the day found that masturbation slightly attenuated the normal afternoon dip in free testosterone but did not cause any significant change in total testosterone, cortisol, or other hormonal ratios.6PubMed Central. Hormonal response after masturbation in young healthy men – a randomized controlled cross-over pilot study The effect was minor and did not translate into any clinically relevant hormonal shift.
A separate study did find that three weeks of complete sexual abstinence led to somewhat higher testosterone measurements in men, but the orgasm itself did not alter testosterone levels.7PubMed. Endocrine response to masturbation-induced orgasm in healthy men following a 3-week sexual abstinence So while prolonged abstinence may nudge testosterone upward, the act of masturbating does not “deplete” it. The idea that each ejaculation saps your manhood is a myth with no solid endocrine backing. The temporary fluctuations involved are well within normal daily variation and have no demonstrated impact on muscle mass, energy, or athletic performance.
Ejaculation Frequency and Prostate Cancer
One of the more robust findings in male sexual health research is the association between higher ejaculation frequency and lower prostate cancer risk. A large prospective study following tens of thousands of men found that those who ejaculated 21 or more times per month had a roughly 20 percent lower risk of prostate cancer compared to those who ejaculated four to seven times per month, both in their twenties and in their forties.8PubMed Central. Ejaculation Frequency and Risk of Prostate Cancer: Updated Results with an Additional Decade of Follow-up Earlier results from the same cohort showed a similar protective trend, with the association strongest for organ-confined (less aggressive) disease.9PubMed. Ejaculation frequency and subsequent risk of prostate cancer
That said, a narrative review pulling together evidence across multiple studies noted that the picture is not perfectly consistent. While several studies point toward a protective effect, others have produced conflicting results, and the research designs vary widely.10PubMed. Ejaculation Frequency and Prostate Cancer Risk: A Narrative Review of Current Evidence The association is with ejaculation frequency overall, not specifically with masturbation versus intercourse, so the mechanism likely involves flushing the prostate gland rather than anything unique to the sexual context. Still, for men wondering whether frequent ejaculation could be harmful, the evidence leans in the opposite direction.
Pelvic Floor Effects
Orgasm is not just a brain event. It involves coordinated, rhythmic contractions of the pelvic floor muscles. Research measuring these contractions during self-stimulation has documented synchronized anal and vaginal contraction waves at orgasm in women.11PubMed. The female orgasm: pelvic contractions More recent work using sensor technology has identified distinct orgasm patterns based on pelvic floor activity, with some women showing a burst-like “wave” pattern, others a building “volcano” pattern, and still others a sustained-tension “avalanche” pattern.12The Journal of Sexual Medicine. Women’s Orgasms Determined by Autodetection of Pelvic Floor Muscle Contractions Using the Lioness “Smart” Vibrator
Why does this matter beyond anatomy trivia? Because stronger pelvic floor muscles are linked to better sexual function. A systematic review and meta-analysis found a moderate positive association between pelvic floor muscle strength and sexual function in women, and all seven observational studies assessing sexual response confirmed that the pelvic floor muscles play a role in both arousal and orgasm.13The Journal of Sexual Medicine. Investigating the role of the pelvic floor muscles in sexual function and sexual response: a systematic review and meta-analysis Masturbation to orgasm, by engaging these muscles repeatedly, may serve as a form of exercise for them, though the research has not isolated masturbation-specific pelvic floor benefits from sexual activity more broadly.
Pain and Arousal
You may have heard that sexual arousal or orgasm can reduce pain. The reality is more nuanced than the headlines suggest. A study testing whether sexual arousal alone could reduce pain in women found that it did not. Viewing sexually arousing material without genital stimulation had no measurable analgesic effect compared to a neutral condition. The researchers suggested that genital stimulation and orgasm may be the key factors in any pain-reducing effect, not arousal on its own.14PubMed Central. The influence of sexual arousal on subjective pain intensity during a cold pressor test in women In practical terms, some people do report that orgasm helps with menstrual cramps or headaches, but the controlled evidence suggests that mere mental arousal without physical stimulation is not enough to move the needle on pain perception.
Mental Health, Mood, and Self-Care
Qualitative research exploring why women masturbate has found that many describe it as a deliberate coping and self-care strategy. Women in one study reported that masturbation reliably produced positive emotional states like happiness and relaxation, and they used it intentionally to manage stress or improve their mood.15PubMed Central. Exploring the Role of Masturbation as a Coping Strategy in Women This framing, masturbation as a form of emotional regulation rather than strictly a sexual act, is increasingly common in clinical and self-help literature.
The flip side, however, is guilt. Cultural, religious, and family messages can transform a neutral or positive behavior into a source of shame, and in clinical settings, that shame can compound into something more serious. A case series documented patients in whom severe guilt about masturbation was associated with the onset of significant psychiatric symptoms.16PubMed Central. Can masturbatory guilt lead to severe psychopathology: a case series The takeaway is not that masturbation causes mental illness, but that the guilt layered on top of it can become a clinical problem in its own right, particularly in communities where the behavior is heavily stigmatized.
Body Image and Sexual Self-Knowledge
How you feel about your body influences your experience of orgasm, whether during partnered sex or solo. Research has found that body image dissatisfaction predicted more difficulty with orgasm during both masturbation and partnered sex at roughly equal strength, meaning this is not a partner-specific problem.17PubMed Central. Body Image, Orgasmic Response, and Sexual Relationship Satisfaction: Understanding Relationships and Establishing Typologies Based on Body Image Satisfaction Less frequent masturbation was also associated with lower body image satisfaction in the same sample. The direction of causation is unclear: people who feel worse about their bodies may masturbate less, or limited sexual self-exploration might reinforce a disconnection from one’s body.
A separate study found that the link between masturbation and positive body image varied by race and ethnicity. Among European American women, more frequent self-pleasure correlated with more positive body image, but among African American women, no such relationship was found.18Psychology of Women Quarterly. The Use of Self-Pleasure: Masturbation and Body Image Among African American and European American Women This suggests the relationship between masturbation and self-concept is shaped by broader cultural and social contexts, not just by the physical act itself.
Masturbation has also been used therapeutically. Directed masturbation training, where a therapist guides a patient through structured self-exploration exercises, has been a recognized treatment for primary anorgasmia (the inability to reach orgasm) for decades. A review of this approach found that some clients could be meaningfully helped by it, though methodological issues made it hard to pin down exact success rates.19PubMed. The use of directed masturbation training in the treatment of primary anorgasmia The logic is straightforward: learning what your body responds to on your own, without the pressure of a partner, can build a foundation for better sexual function overall.
Masturbation and Relationship Satisfaction
Whether solo masturbation helps or hurts a partnered relationship is one of those questions that sounds simple but produces messy data. A systematic review of 22 studies found that among men, the majority of studies (about 71 percent) reported a negative association between masturbation frequency and sexual satisfaction. Among women, the results were far more mixed: about 40 percent of studies found no relationship, a third found a negative one, and about a quarter found a positive one.20PubMed Central. Relationship between Solitary Masturbation and Sexual Satisfaction: A Systematic Review
Interpreting this requires caution. The negative association in men could mean that masturbation makes men less satisfied with partnered sex, but it could just as easily mean that men who are already dissatisfied with their sex lives masturbate more to compensate. The mixed picture in women may reflect the greater variability in how women relate to solo sexuality, with some using it as a complement to their partnered life and others turning to it when the relationship side is lacking. What the data do not support is a blanket claim that masturbation either strengthens or weakens relationships. The direction depends heavily on context, motivation, and how the partners communicate about it.
The Abstinence Movement and Its Motivations
Online communities promoting abstinence from masturbation, sometimes as part of “NoFap” or “semen retention” movements, have grown in recent years. Research looking into who seeks abstinence and why found that the primary motivations were attitudinal rather than behavioral. People who wanted to abstain tended to perceive masturbation as unhealthy. Higher abstinence motivation correlated with greater conservatism, higher religiosity, and lower trust in science.21PubMed Central. Abstinence from Masturbation and Hypersexuality The study did not find a significant correlation between abstinence motivation and behavioral markers like maximum number of orgasms, suggesting that the desire to quit was driven more by belief systems than by actual compulsive behavior.
This does not mean everyone who wants to reduce their masturbation frequency is wrong to try. For some people, habitual masturbation genuinely interferes with daily life, work, or relationships. But the evidence suggests that the widespread anxiety about masturbation being inherently harmful is more cultural than medical, and that the motivation to abstain often tracks more closely with moral frameworks than with any measurable health concern.
A Long History of Unfounded Fear
The stigma around masturbation has deep roots, especially in English-speaking cultures. During the 19th century, American medical authorities were convinced that masturbation caused nearly every social problem and disease imaginable. Even after germ theory became accepted in the late 1800s, the U.S. medical establishment continued to insist well into the mid-20th century that masturbation was both a pathological act and a cause of mental and physical illness.22PubMed. The antimasturbation crusade in antebellum American medicine Treatments prescribed to “cure” the supposed affliction ranged from dietary restrictions (the cornflake, famously, was born of anti-masturbation zeal) to mechanical devices and, in severe cases, surgery. These interventions had no scientific basis and caused real harm to patients who were essentially punished for normal sexual development.
Modern medicine has firmly reversed course, but echoes of this history survive in the form of cultural shame, vague warnings from authority figures, and the persistent belief that masturbation must be “bad for you” in some way that science has not yet proven. Understanding the historical context helps explain why the guilt described in the clinical research above remains so prevalent despite decades of contrary evidence.
Why Masturbation Exists at All
From a purely evolutionary standpoint, masturbation seems like wasted effort. A behavior that expends energy without producing offspring should be selected against. Yet masturbation is documented across the entire primate order, and a large phylogenetic study found that it is an ancient trait that became especially common after the evolutionary split from tarsiers. The researchers tested two functional hypotheses and found support for both in males: masturbation may improve the chances of fertilization by keeping sperm fresh and motile, and it may reduce the risk of genital infection by flushing pathogens from the tract.23PubMed Central. The evolution of masturbation is associated with postcopulatory selection and pathogen avoidance in primates In females, the evolutionary picture is less well resolved, but the sheer prevalence of the behavior across species makes it difficult to dismiss as a mere byproduct of high sexual arousal.
Physical Risks Worth Knowing About
The physical risks of masturbation are almost entirely about technique rather than the behavior itself. Overly vigorous or awkward manual stimulation can, in rare cases, cause injury. Penile fracture, for instance, a rupture of the tunica albuginea (the tough tissue lining the erectile chambers), is most often caused by trauma during intercourse but has also been documented during masturbation. Symptoms include a cracking sound, rapid loss of erection, swelling, and sometimes urethral bleeding.24PubMed Central. Penile Fracture during masturbation – a case report This is a urological emergency requiring prompt surgical repair, but it is exceedingly rare. Irritation from friction or from certain lubricants is far more common and is easily avoided with appropriate products and a lighter touch.
There is no evidence that masturbation causes blindness, infertility, hair loss, acne, erectile dysfunction, or any of the other conditions historically attributed to it. Temporary fatigue or muscle soreness afterward is normal and is the same post-exertion feeling you would get from any physical activity involving muscle tension and release.
Technology and Changing Norms
The way people masturbate has changed alongside technology. The global market for sex toys has expanded rapidly, and research tracking web search trends confirms growing interest in devices that go well beyond simple vibrators. Modern innovations include teledildonic technology, which allows a partner to control a toy remotely over the internet, and vibrators with integrated cameras.25PubMed Central. Global web trends analysis of sex toys These developments reflect a broader normalization of masturbation as part of sexual wellness rather than something to hide. They also raise newer questions about digital privacy, body data, and the boundary between solo and partnered experience, questions the research is only beginning to catch up with.