Squirting during sex involves a rapid, involuntary release of fluid from the urethra, driven by intense sexual arousal. The fluid comes primarily from the bladder, which fills rapidly during stimulation and empties at or near orgasm. But squirting is not simply urinating: the fluid often contains secretions from small glands surrounding the urethra that are biochemically similar to the male prostate. The science here is more nuanced than most people realize, and what triggers the experience involves a mix of anatomy, arousal, and the nervous system.
Squirting and Female Ejaculation Are Not the Same Thing
One of the biggest sources of confusion is that “squirting” and “female ejaculation” get used interchangeably in conversation, in porn, and even in some older medical literature. Researchers now treat them as related but distinct phenomena that can happen independently or at the same time. Squirting involves a larger volume of clear, watery fluid, typically around 60 milliliters but sometimes much more, that originates in the bladder. Female ejaculation, by contrast, produces a much smaller amount of thick, whitish fluid, usually just a few milliliters, from the paraurethral glands (also called Skene’s glands).1PubMed. Female ejaculation and squirting as similar but completely different phenomena: A narrative review of current research
A 2025 systematic review and meta-analysis pooling data from multiple studies confirmed this distinction using biochemical markers. Fluid from squirting had high concentrations of urea and creatinine consistent with diluted urine, while fluid from female ejaculation had elevated prostate-specific antigen (PSA) and almost no urinary markers. The volume difference was stark: a median of 60 milliliters for squirting versus one to five milliliters for ejaculation.2The Journal of Sexual Medicine. Female Ejaculation, Squirting, and Coital Incontinence: A Systematic Review and Meta-Analysis of Biochemical, Imaging, and Urodynamic Diagnostic Criteria Many women who squirt may also be ejaculating simultaneously without realizing it, because the larger volume of squirting fluid masks the smaller ejaculatory secretion.
What Actually Happens Inside the Body
The clearest imaging evidence comes from a widely cited 2015 study that used ultrasound to watch the bladder in real time during sexual arousal and squirting. Participants started with an empty bladder, confirmed by scan. As arousal built over a variable period of stimulation, a second scan showed the bladder had filled noticeably, even though the women had not been drinking extra fluids. When squirting occurred, a third scan showed the bladder had emptied again.3The Journal of Sexual Medicine. Nature and Origin of “Squirting” in Female Sexuality This rapid, involuntary bladder filling during arousal is the key mechanism behind squirting. The kidneys appear to produce urine at an accelerated rate during high arousal, though the exact hormonal or neural signal driving that acceleration is still not fully mapped.
The biochemical makeup of squirting fluid supports the bladder origin. It contains urea, creatinine, and uric acid at concentrations comparable to diluted urine. But in most of the women studied, the fluid also contained PSA, a protein not normally found in urine. PSA was absent from the baseline urine sample collected before arousal but present in the squirting fluid, suggesting that Skene’s gland secretions mix in as the fluid passes through the urethra.4PubMed. Nature and origin of “squirting” in female sexuality So the fluid is urine-based, but it is not identical to what you would produce by simply going to the bathroom.
The Role of the “Female Prostate”
The paraurethral glands, or Skene’s glands, sit along the front wall of the vagina, surrounding the urethra. These glands are the source of the small-volume, whitish ejaculatory fluid that is distinct from squirting. Anatomically and histologically, they share features with the male prostate, including the ability to produce PSA. Some researchers have argued they should simply be called the female prostate.5Sexual 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
The size and development of these glands vary widely between individuals. Some women have prominent, well-developed paraurethral tissue; others have very little. This natural variation may partly explain why some women ejaculate and others do not, and why the PSA concentrations found in squirting fluid differ from person to person. A detailed case study of one woman who could produce both types of fluid on demand showed that her ejaculatory fluid had PSA levels biochemically comparable to some components of male semen, while her squirting fluid looked like diluted urine.6The Journal of Sexual Medicine. New Insights from One Case of Female Ejaculation
How Common Is Squirting
Prevalence estimates vary depending on how you ask the question and who you ask. A nationally representative U.S. probability sample found that about 40 percent of adult women had squirted at least once in their lifetime, with a median frequency of three to five times.7PubMed. Vaginal Squirting: Experiences, Discoveries, and Strategies in a U.S. Probability Sample of Women Ages 18-93 A Swedish cross-sectional study reported an even higher figure: 58 percent of women had personal experience with ejaculation or squirting, with an additional 6 percent unsure whether it had occurred.8PubMed Central. Women’s experiences of female ejaculation and/or squirting: a Swedish cross-sectional study
The Swedish study also found that women with non-heterosexual orientations were more likely to report having experienced it than heterosexual women (about 63 percent versus 52 percent). Among women who had never squirted, nearly a third said they wished they could, and another third were open to the idea.8PubMed Central. Women’s experiences of female ejaculation and/or squirting: a Swedish cross-sectional study The gap between these two prevalence estimates may reflect differences in survey design, cultural openness, or the fact that the Swedish study did not separate ejaculation from squirting. Either way, the numbers make clear that this is not a rare phenomenon. It is a common part of many women’s sexual experience.
What Triggers It
There is no single technique or body part that reliably produces squirting in every woman. The anterior vaginal wall, which sits against the urethra and the paraurethral glands, is the area most commonly associated with triggering both squirting and ejaculation. Stimulation of this area, sometimes called the G-spot region, activates what researchers describe as the clitourethrovaginal complex: the internal structure of the clitoris, the urethra, and the surrounding glandular and erectile tissue all working together.9PubMed. The complexity of female orgasm and ejaculation There is no discrete “G-spot organ”; it is a zone where multiple sensitive structures overlap.
Arousal intensity appears to matter more than any specific kind of touch. The bladder filling that precedes squirting happens during high arousal states, and the expulsion tends to coincide with orgasm or the peak of arousal leading up to it. For some women, the sensation immediately before squirting resembles the urge to urinate, which can cause them to tense up and suppress it. A qualitative study of young women’s experiences found that psychological trust and acceptance played a major role. As one participant put it, she could not squirt with someone she did not trust and needed to feel accepted by the other person.10The Journal of Sexual Medicine. Experiences of young women in the practice of squirting: a descriptive qualitative study The ability to relax the pelvic floor rather than contract it appears to be a consistent theme across self-reports.
A case-control study comparing women who regularly squirt with controls found that the squirting group scored higher on validated measures of sexual desire, arousal, lubrication, and orgasm intensity. They also reported greater sexual excitability and, interestingly, lower body-image distress and less discomfort with emotional closeness. This suggests that the experience is linked to a constellation of psychological and physiological factors, not a single anatomical switch.
It Is Not Incontinence
One of the most persistent misconceptions is that squirting is just stress urinary incontinence that happens to occur during sex. There is a real clinical entity called coital incontinence, which involves involuntary urine leakage during penetration or orgasm, and it can understandably be confused with squirting. But researchers who have compared the two emphasize that they are distinct. Coital incontinence is associated with underlying pelvic floor disorders like stress incontinence or overactive bladder, and the fluid is straightforward urine without the PSA admixture typically seen in squirting.11PubMed. Differential diagnostics of female “sexual” fluids: a narrative review
A systematic review looking at all three phenomena concluded that female ejaculation and squirting are normal physiological responses, while coital incontinence is a pathological sign that may need treatment.12PubMed. Female ejaculation orgasm vs. coital incontinence: a systematic review The practical distinction matters because a woman who is squirting does not need to see a urologist, while a woman who is leaking urine during sex due to pelvic floor dysfunction may benefit from evaluation. The two can feel similar, and the overlap is one reason this area of research has been so tangled. If the fluid only appears during high arousal and is associated with pleasurable sensation, it is almost certainly squirting rather than incontinence. If leakage occurs with any physical exertion, including coughing or lifting, or if it causes distress, a medical evaluation makes sense.
Why the “It’s Just Pee” Framing Misses the Point
The finding that squirting fluid originates in the bladder has led to a reductive shorthand in popular culture: “squirting is just peeing.” This framing is technically incomplete and often used to shame or dismiss women’s sexual experiences. Yes, the bulk of the fluid is dilute urine. But it is produced and expelled through a mechanism that is fundamentally different from normal urination. The bladder fills rapidly during arousal in a way it does not during everyday life, and the expulsion is involuntary and linked to the autonomic nervous system’s activity during orgasm. The parasympathetic nervous system, which governs involuntary functions like digestion and arousal, is the dominant branch active during this process.13PubMed. Anatomic documentation of the G-spot complex role in the genesis of anterior vaginal wall ballooning
Additionally, as noted above, the fluid frequently contains PSA from the paraurethral glands, a component absent from normal urine. The researchers who conducted the ultrasound-guided study themselves were careful to say squirting is “essentially” an involuntary emission of urine, while acknowledging “a marginal contribution of prostatic secretions.” Treating squirting as identical to urination ignores both the distinctive neural pathway and the biochemical admixture that make it a sexual response rather than a bladder control failure.
Pornography and Unrealistic Expectations
Squirting has become a highly visible genre in pornography, which has shaped public perception in ways that do not align well with the science. In porn, squirting is frequently presented as a guaranteed sign of extreme pleasure, a goal every partner should aim for, and something that happens in spectacular high-volume gushes on cue. Women in qualitative research have pushed back on this framing. One participant in a study noted that pornography “affects very negatively because men consider that women must do it and they turn it into their purpose,” and that it creates a false link between squirting and orgasm.10The Journal of Sexual Medicine. Experiences of young women in the practice of squirting: a descriptive qualitative study
Squirting does not necessarily accompany orgasm, and orgasm does not necessarily produce squirting. Some women squirt and find it intensely pleasurable; others find it neutral or mildly annoying. The pressure on partners to “make” a woman squirt can backfire, turning what might otherwise be a relaxed, trusting sexual encounter into a performance with a pass/fail outcome. An international survey of women who ejaculate found that nearly 79 percent of women and 90 percent of their partners viewed it as an enrichment of their sex lives. But a small percentage of women reported that their partners were not even aware it could happen.14PubMed. International online survey: female ejaculation has a positive impact on women’s and their partners’ sexual lives The takeaway is that squirting can be a positive experience when it happens naturally within a trusting dynamic, and a source of anxiety when it becomes a performance metric.
Why It Might Exist at All
The evolutionary purpose of squirting, if there is one, remains speculative. One hypothesis proposes that the antimicrobial properties of paraurethral gland secretions could protect the urethra from infection after intercourse. Under this model, women who could expel these secretions into the urethral opening were less likely to develop urinary tract infections, which in turn made them more receptive to frequent intercourse and therefore more likely to become pregnant.15PubMed. Does female ejaculation serve an antimicrobial purpose? The PSA in female ejaculatory fluid does have known antimicrobial properties, lending some plausibility to the idea, though it remains unproven.
A more recent hypothesis focuses on the chemical environment of the vagina. The vagina is naturally acidic, with a pH that is hostile to sperm. One paper has proposed that ejaculatory fluids could raise vaginal pH toward the neutral range where sperm survive better, and release substances that enhance sperm motility toward the egg.16Medical Hypotheses. Female ejaculation enhances reproductive success Both of these ideas are intriguing but remain in the hypothesis-testing stage. Neither has been confirmed through controlled experiments in humans.
Centuries of Recognition, Then Erasure
The idea that women produce fluid during sex is far from new. Chinese Taoist texts described it as early as the fourth century, and ancient Indian writings in the Kāmaśāstra tradition discussed it in detail beginning around the seventh century. In the Western tradition, Aristotle referenced female fluid emission around 300 B.C., and Galen discussed it in the second century. The Dutch physician Reinier de Graaf provided the first anatomical description in the seventeenth century and was the first to call the paraurethral glands the “female prostate.”17PubMed. The history of female ejaculation
Despite this long record, the phenomenon was largely ignored or pathologized in Western medicine through much of the twentieth century. Ernst Gräfenberg’s 1952 paper on “the role of the urethra in female orgasm” helped revive scientific interest, but mainstream urology and gynecology remained skeptical for decades. The resurgence of research since the 2000s has been driven partly by improved imaging, partly by biochemical analysis, and partly by a cultural shift toward taking women’s reports of their own sexual experiences seriously. The research is still catching up: most studies involve small sample sizes, and there is no standardized clinical protocol for distinguishing squirting from ejaculation from incontinence in a doctor’s office. What has changed is that the default assumption is no longer that these women are simply incontinent.
Variation in Paraurethral Gland Anatomy
One reason squirting and ejaculation vary so much between individuals is that the paraurethral glands themselves are not uniform. Anatomical studies have found that these glands range from well-developed structures with multiple ducts opening into the urethra to barely detectable remnants. The number, size, and positioning of the gland ducts differ enough that some researchers have questioned whether all women even have the anatomical equipment for ejaculation in the strict sense.18PubMed. Female ejaculation: An update on anatomy, history, and controversies This glandular variability does not necessarily predict who will squirt, since squirting is primarily a bladder event, but it may influence whether the expelled fluid contains PSA and whether a woman also produces the smaller-volume ejaculatory secretion alongside it.
The tissue in this region does not exist in isolation. It sits within the broader clitourethrovaginal complex, where the internal wings of the clitoris, the vaginal wall, the urethra, and the glandular tissue all occupy overlapping space. Stimulation of the anterior vaginal wall activates this whole network, which is why the sensation and the response can differ so much depending on the type of touch, the angle, and the level of arousal. There is no single button to push. The anatomy is a layered system that responds to sustained, building arousal more than to any one motion or spot.