Squirting is the involuntary release of fluid from the urethra during sexual arousal or orgasm. The fluid comes primarily from the bladder and is chemically similar to very dilute urine, though it often contains small amounts of secretions from glandular tissue surrounding the urethra. Research over the past decade has clarified that squirting is a real physiological event, distinct from both ordinary urination and from a separate phenomenon called female ejaculation, and it is far more common than many people assume.
What the Fluid Actually Contains
One of the first questions people have is whether the fluid is urine. The honest answer is: mostly, but not exactly. Biochemical analyses show that squirting fluid contains urea, creatinine, and uric acid, the same waste products found in urine, but at significantly lower concentrations. A case study that measured squirting fluid against the woman’s own urine samples found that the squirting fluid had the chemical profile of diluted urine, with a density around 1,001 (compared to roughly 1,010–1,025 for typical urine).1The Journal of Sexual Medicine. New Insights from One Case of Female Ejaculation In plain terms, the fluid starts in the bladder but gets significantly watered down, and it doesn’t look, smell, or behave like a normal trip to the bathroom.
Crucially, the squirting fluid also frequently contains prostate-specific antigen, or PSA. This is the same marker associated with the male prostate. Its presence in squirting fluid tells researchers that secretions from glandular tissue near the urethra mix in with the bladder fluid on its way out.2PubMed. Nature and origin of “squirting” in female sexuality So while the bulk of the volume is bladder-derived, it’s not purely urine. It’s a mixture, and the proportions vary from person to person and even from one occasion to another.
How Squirting Differs from Female Ejaculation
This is where a lot of confusion lives. In everyday conversation, “squirting” and “female ejaculation” are used interchangeably. In the research literature, they are two separate events with different sources, different volumes, and different compositions. The distinction matters because conflating them has muddied the science for decades.
Female ejaculation is the release of a small amount of thick, whitish fluid from the Skene’s glands, sometimes called the female prostate. These glands sit on either side of the urethra. The fluid they produce is rich in PSA and is biochemically comparable to some components of male semen. The volume is typically just a few milliliters, and it can happen without the person even noticing.3PubMed. Differential diagnostics of female “sexual” fluids: a narrative review
Squirting, by contrast, involves a much larger volume of transparent fluid, often tens of milliliters or more, expelled from the urethra in a noticeable gush. This fluid originates primarily from the bladder.4PubMed. Female ejaculation and squirting as similar but completely different phenomena: A narrative review of current research The two phenomena can and sometimes do happen simultaneously, which is part of why they’ve been so hard to tease apart. But they are driven by different anatomical structures and produce fundamentally different fluids.
What Happens Inside the Body
The most striking piece of evidence for the bladder’s role comes from a French study that used ultrasound imaging before, during, and after sexual stimulation. All participants emptied their bladders at the start. Ultrasound confirmed the bladders were empty. Then, as arousal built, the bladders visibly refilled. And immediately after squirting, the bladders were empty again.5The Journal of Sexual Medicine. Nature and Origin of “Squirting” in Female Sexuality The kidneys were producing urine rapidly during arousal, the bladder was storing it, and orgasm triggered its release through the urethra. This rapid bladder-filling during arousal appears to be an involuntary process linked to the nervous system’s response during sexual stimulation.
The neural circuitry behind this is complex. Sexual responses require coordination between the sympathetic, parasympathetic, and somatic nervous systems, all of which are managed by nerve centers in the lower spinal cord and brainstem.6PubMed. The neural control of female sexual function Brain-imaging research has shown that ejaculation in men and orgasm in women activate the same brainstem region that also controls bladder voiding, though on opposite sides of that structure.7PubMed. Pontine control of ejaculation and female orgasm This anatomical overlap between orgasm circuits and urination circuits goes a long way toward explaining why fluid release from the bladder can be triggered by sexual climax. The wiring is shared.
The Glands Behind the Scenes
The Skene’s glands, which sit alongside the urethra, have been increasingly recognized by anatomists as the female equivalent of the male prostate. Histological studies have found that this tissue shares the same cellular architecture and produces the same chemical markers, including PSA, as prostate tissue in men.8Sexual Medicine Reviews. Should We Call it a Prostate? A Review of the Female Periurethral Glandular Tissue Morphology, Histochemistry, Nomenclature, and Role in Iatrogenic Sexual Dysfunction Rodent studies have further confirmed that the female prostate is homologous to the male version, with strong structural similarities.9PubMed. Female prostate: historical, developmental, and morphological perspectives
This tissue varies considerably in size from one person to the next. Some women have well-developed glandular tissue surrounding the urethra; others have very little. This variation likely helps explain why some women produce a noticeable whitish ejaculate alongside squirting fluid while others don’t, and why the PSA concentration in squirting fluid differs between individuals. The prostate is not exclusively a male organ; it exists across several mammalian species in both sexes.10PubMed. Differences between male and female prostates in terms of physiology, sensitivity to chemicals and pathogenesis-A review in a rodent model One hypothesis, not yet proven, is that these glandular secretions may serve an antimicrobial purpose, helping to flush bacteria from the urethra during sexual activity.11PubMed. Does female ejaculation serve an antimicrobial purpose?
How Common Squirting Is
Far more common than most people think. A U.S. probability sample of women aged 18 to 93 found that about 40% had squirted at least once in their lifetime.12PubMed. Vaginal Squirting: Experiences, Discoveries, and Strategies in a U.S. Probability Sample of Women Ages 18-93 Among those who had, the median frequency was three to five times total, meaning this is something many women have experienced but most don’t experience routinely.
About two-thirds of women in that same study reported discovering squirting unintentionally. It happened during sex and caught them off guard. Most of those who did go on to squirt regularly reported using specific techniques to build up to it, rather than it occurring spontaneously every time. A Swedish study found that vaginal stimulation, clitoral stimulation, or a combination of both were the primary methods, with combined stimulation being the most commonly reported approach at about 39%, followed by vaginal stimulation alone at about 36%.13Sexual Medicine. Women’s experiences of female ejaculation and/or squirting: a Swedish cross-sectional study
Squirting Versus Incontinence
Because squirting involves fluid from the bladder exiting through the urethra, it’s natural to wonder whether it’s just urinary incontinence during sex. Researchers have spent real effort drawing this line. A systematic review examining the evidence concluded that squirting and coital incontinence are “similar but pathophysiologically distinct phenomena.” Coital incontinence is a medical condition associated with stress urinary incontinence or overactive bladder, and it occurs in two forms: one triggered by penetration and another triggered by orgasm. It’s caused by underlying urethral or bladder disorders and typically warrants treatment.14PubMed. Female ejaculation orgasm vs. coital incontinence: a systematic review
Squirting, by contrast, occurs in women with no urinary disorder and is considered part of the normal range of sexual response. The fluid composition is different, the mechanism is different, and the context is different. That said, the evidence here is still evolving. The research community has been slow to study these phenomena rigorously, partly because of stigma and partly because the studies are inherently difficult to conduct. If fluid loss during sex is causing distress or happening outside of arousal, it’s worth talking to a doctor to rule out incontinence. But experiencing squirting during sex is not, by itself, a sign of a medical problem.
What Influences Whether It Happens
There’s no single factor that determines who squirts and who doesn’t. The picture that emerges from the research is that it involves a combination of anatomy, arousal, and circumstance. Variation in Skene’s gland size, pelvic floor muscle tone, hydration, the type and duration of stimulation, and the degree of arousal all seem to play into whether the experience occurs.
Psychological and relational factors matter too. Research into the female orgasm more broadly has found that it’s influenced by emotional intimacy, communication, body image, self-esteem, and comfort with a partner.15SpringerLink / Archives of Gynecology and Obstetrics. The complexity of female orgasm and ejaculation Since squirting is closely tied to high levels of arousal and often to orgasm, these same factors likely affect whether and when it happens. The ability to relax and let go of self-consciousness appears to be part of the equation. This isn’t something you can reduce to a simple anatomy lesson.
The Pornography Problem and Partner Expectations
Squirting occupies a strange cultural space. Pornography has turned it into a spectacle, framing it as proof of extraordinary pleasure or as a performance goal. This has created real problems for real people. A qualitative study of young women’s experiences found that participants felt pornography “affects very negatively because men consider that women must do it and they turn it into their purpose,” and that in porn, “squirting is associated with orgasm and pleasure, when the reality is not like that.”16The Journal of Sexual Medicine. Experiences of young women in the practice of squirting: a descriptive qualitative study
Research into how male partners respond to squirting has identified a wide range of reactions that fall into distinct patterns. Some partners treat it as a neutral bodily response and are supportive. Some find it exciting and view it as an achievement or proof that they’ve satisfied their partner. Others react negatively or dismissively. And in the most concerning pattern, some partners pressure or coerce women into squirting, pushing past boundaries because they’ve been conditioned to see it as a goal.17PubMed Central. Squirting Scripts: Navigating Validation, Avoidance, Desire, and Coercion in Sexual Encounters Between Women and Men
The core misconception fueling these dynamics is that squirting equals orgasm, or that it’s a reliable indicator of pleasure. It isn’t. Squirting can happen with orgasm, before orgasm, or without orgasm at all. It can be pleasurable, neutral, or embarrassing, depending on the context and the person. Treating it as a performance metric puts pressure on the person experiencing it and distorts what the experience actually means. Some of the women in the qualitative study described frustration with feeling socialized to prioritize their partner’s satisfaction, with squirting becoming one more arena where they felt they had to perform rather than simply enjoy themselves.
A Phenomenon That Has Been Recognized for Centuries
The idea that female fluid expulsion during sex is some new discovery is wrong. Historical records show awareness of it stretching back thousands of years. Chinese Taoist texts described it starting in the 4th century. Ancient Indian writings in the Kāmaśāstra literature discussed it in detail. In the Western tradition, Aristotle described it around 300 B.C., and Galen wrote about it in the 2nd century.18PubMed. The history of female ejaculation The Dutch physician Reinier de Graaf provided the first scientific description in the 17th century and was the first to identify the periurethral glands as the female prostate.
Despite this long history, the phenomenon has been repeatedly “rediscovered” and re-debated. Ernst Gräfenberg brought it back into scientific conversation in 1952 with his paper on the role of the urethra in female orgasm. A review of 44 publications spanning 1889 to 2019 concluded that while views about female ejaculation “remain controversial and inconsistent, with no clear conclusion as to its function,” the accumulated anatomical and clinical evidence provides substantial support that the phenomenon is real.19PubMed. Female ejaculation: An update on anatomy, history, and controversies The cycle of discovery, dismissal, and rediscovery has more to do with cultural discomfort around female sexuality than with any genuine scientific ambiguity about whether the phenomenon exists.
What Researchers Still Don’t Know
For all the progress of the past two decades, the science here remains surprisingly thin. Most of the foundational studies have small sample sizes. The ultrasound study that demonstrated bladder filling and emptying during squirting included only seven participants. Biochemical analyses have been done on limited numbers of samples. The systematic review that distinguishes squirting from coital incontinence noted that objective evidence of female ejaculation has been documented “only in tens of cases,” and that the high prevalence figures come mostly from self-reported questionnaire data rather than lab-confirmed observation.14PubMed. Female ejaculation orgasm vs. coital incontinence: a systematic review
Open questions remain about why the bladder fills so rapidly during arousal, whether this serves any biological purpose, how much individual anatomical variation in the Skene’s glands influences the experience, and why some women squirt regularly while others never do. The antimicrobial hypothesis for prostatic secretions is still speculative. And the neural pathways that link arousal circuitry to bladder function are understood in broad strokes but not in the kind of fine-grained detail that would allow clinicians to predict who will experience squirting or under what conditions. This is a corner of sexual medicine that could use considerably more investment and less squeamishness from funding bodies.