A “squirter” refers to a person who expels a noticeable amount of fluid from the urethra during sexual arousal or orgasm. This is a real physiological event, not a myth or performance trick. Research estimates that between 41% and 58% of women have experienced it at least once, making it far more common than many people assume.
The topic carries a lot of confusion, partly because popular culture treats it as one thing when science has identified two distinct phenomena happening in the same general area. Understanding the difference clears up most of the mystery.
Squirting and Ejaculation Are Two Different Things
Researchers now distinguish between squirting and female ejaculation. They can happen separately or at the same time, but they involve different fluids, different sources, and different volumes.
Squirting is the expulsion of roughly 10 milliliters or more of thin, transparent fluid through the urethra during orgasm. Biochemical analysis shows this fluid is similar in composition to very dilute urine: it contains urea, creatinine, and uric acid, and it originates from the bladder. Ultrasound imaging confirms that the bladder fills rapidly during arousal and empties during the squirting event, even when the person urinated shortly before. The fluid often contains small amounts of prostatic secretions mixed in, which is why it isn’t identical to regular urine.
Female ejaculation, by contrast, produces just a few milliliters of thick, milky fluid. This secretion comes from the Skene’s glands (sometimes called the female prostate), two small glands located near the lower end of the urethra. The fluid is rich in prostate-specific antigen, glucose, and fructose, and contains virtually no urea. It closely resembles components found in male seminal fluid. Many people never notice female ejaculation at all because the volume is so small it simply mixes with other vaginal lubrication.
When someone is described as a “squirter,” they’re typically experiencing the larger-volume release, the smaller ejaculation, or both simultaneously.
The Anatomy Behind It
The Skene’s glands are central to both phenomena. These glands develop from the same embryonic tissue that becomes the prostate in males, which explains the chemical similarities between their secretions and components of semen. During sexual arousal, increased blood flow causes the tissue surrounding the Skene’s glands to swell. This swelling puts pressure on the urethra and the surrounding area.
The glands secrete fluid in response to arousal, contributing to lubrication. In some people, they also release a more concentrated burst of fluid during orgasm. The size and development of Skene’s glands varies significantly from person to person, which likely explains why some people ejaculate more readily than others.
For the larger squirting response, the bladder plays the primary role. Imaging studies show the bladder filling noticeably during extended arousal, then emptying rapidly at the point of orgasm. This release is involuntary, driven by the muscular contractions of orgasm rather than a conscious decision. The fluid passes through the urethra just as urine would, but the context and mechanism are tied to sexual response rather than normal bladder function. Researchers have noted that this is distinct from coital incontinence, where urine leaks during sex without orgasm.
What Triggers Squirting
Stimulation of the front wall of the vagina is the most consistently reported trigger. This area, often called the G-spot, runs along the course of the urethra on the vaginal side. During arousal, it swells noticeably due to increased blood flow to the surrounding clitoral and urethral complex. One study found that stimulation of this zone led to orgasm in about 73% of participants, and ejaculation occurred in 100% of those who had a clearly localized sensitive spot in the area.
The most effective technique in research settings involved one or two fingers pressing against the front vaginal wall, sometimes combined with gentle abdominal pressure from the outside. In some cases, a vibrator was used when ejaculation was difficult to trigger through manual stimulation alone. About one-third of participants in one study also reported that deep vaginal stimulation with cervical contact was effective.
What’s happening physically is that the front vaginal wall, the internal roots of the clitoris, and the urethra form an interconnected complex. When pressure is applied to the vaginal wall, it stimulates all three structures simultaneously. Imaging has shown the clitoral roots shifting 2.5 to 5 millimeters during this kind of internal stimulation, a movement that doesn’t occur with external clitoral stimulation alone. This combined internal pressure on the urethral area and Skene’s glands appears to be the key mechanical trigger.
How Common It Really Is
A large Swedish study of over 1,500 women found that 58% had experienced ejaculation or squirting. A separate U.S. study placed the number at 41%. These figures are much higher than older estimates, which often described the phenomenon as rare. The difference likely comes from how the question was asked: earlier surveys used narrower definitions or relied on clinical populations, while newer research simply asks people about their experiences in broader terms.
Some people squirt frequently, others only in specific circumstances, and many never do. None of these patterns indicates a problem. The variation comes down to differences in anatomy (particularly the size and responsiveness of the Skene’s glands), the type of stimulation, arousal levels, and pelvic floor muscle tone.
Why the Fluid Composition Matters
The fact that squirting fluid comes primarily from the bladder and resembles dilute urine is the single biggest source of anxiety around the topic. Many people worry they’re simply urinating during sex. The chemistry tells a more nuanced story.
True squirting fluid, while originating in the bladder, frequently contains prostatic secretions from the Skene’s glands that are absent from normal urine. It also tends to be more dilute than typical urine, suggesting the kidneys produce it rapidly during the arousal period rather than it being stored urine sitting in the bladder for hours. The fluid is usually clear or very lightly colored and either odorless or with a much milder scent than urine.
Female ejaculate, the thicker fluid from the Skene’s glands, has a completely different profile. It’s high in PSA, glucose, and fructose, and contains essentially no urea. This is a genuine secretion with no meaningful resemblance to urine.
In practice, most people who squirt are releasing a mix of both fluids. The ratio varies from person to person and even from one occasion to the next. Regardless of the exact composition, the experience is a normal part of sexual response for a significant portion of the population.