The colloquial term “creaming” refers to the visible, often whitish fluid that appears during sexual arousal or orgasm. Biologically, this involves up to three distinct fluids produced by different structures, and most of what people notice is vaginal lubrication, a plasma-based fluid that seeps through the vaginal walls when blood flow to the pelvic region increases. But the thick, cream-like appearance that gives the phenomenon its name can also involve secretions from small glands near the vaginal opening and urethra, each with its own chemistry and trigger.
Three Different Fluids, Three Different Sources
Researchers now distinguish between three types of sexual fluid in women, and lumping them together has historically caused confusion in both medicine and popular culture. The first is vaginal lubrication, which is a filtrate of blood plasma that passes through the vaginal walls during arousal. The second is female ejaculation, a small volume of thick, milky fluid released by glands near the urethra during orgasm. The third is squirting, which involves a much larger volume of dilute fluid expelled from the bladder.
1PubMed. Differential diagnostics of female “sexual” fluids: a narrative reviewThe distinction matters because each fluid has a different composition, a different source organ, and a different trigger. Female ejaculation and squirting in particular are often confused with each other, but studies confirm they come from entirely separate structures and mechanisms. The ejaculatory fluid is scanty, thick, and whitish, originating from what is now called the female prostate. Squirting fluid is dilute and comes from the bladder.
2The Journal of Sexual Medicine. New Insights from One Case of Female EjaculationWhen people talk about “creaming,” they are usually observing some combination of vaginal lubrication and the milky ejaculatory fluid. The thick, opaque appearance is most closely associated with the prostatic secretion, though vaginal transudate itself can appear white or cloudy depending on the phase of the menstrual cycle and the vaginal microbiome.
How Vaginal Lubrication Actually Works
The vagina does not contain its own dedicated lubrication glands the way the mouth has salivary glands. Instead, lubrication happens through a process called transudation. At rest, a small amount of plasma constantly seeps from tiny blood vessels in the vaginal wall, through the tissue layers, and into the vaginal canal, where it mixes with cervical mucus.
3Sexual and Relationship Therapy. The ins and outs of vaginal lubricationDuring arousal, blood flow to the pelvic region increases dramatically, and the pressure in those capillary beds rises. This forces more plasma through the vaginal walls, producing noticeably more fluid. The process is essentially hydraulic: more blood in the area means more fluid pushed out. The resulting transudate is clear to slightly milky, slippery, and mildly acidic. Its volume varies widely between individuals and even between encounters for the same person.
This mechanism also explains why arousal-related lubrication can take time to appear and why it sometimes seems out of sync with how turned on someone feels mentally. The blood flow increase depends on physical signals from the nervous system, not just psychological desire, which is why stress or distraction can delay lubrication even when interest is high.
The Role of Nitric Oxide and Estrogen
Two molecules are especially important for getting that blood flow going. Nitric oxide is a signaling molecule that relaxes smooth muscle in blood vessel walls, causing them to widen and let more blood through. This vasodilation cascade is what drives the increase in vaginal transudate. Research in animal models has shown that nitric oxide contributes more substantially to vaginal blood flow increases than estrogen does, making it a more significant driver of the lubrication process.
4The Journal of Sexual Medicine. Comparing the Contributions of Nitric Oxide and Estrogen to Methamphetamine-Induced Alterations of Vaginal Blood Flow in RatsThat said, estrogen still plays a critical background role. In animal studies, removing the ovaries caused a marked decrease in vaginal lubrication. Treating those animals with estradiol restored both genital blood flow and lubrication to levels that actually exceeded those of intact controls. Testosterone treatment, by contrast, did not have the same restorative effect on lubrication.
5PubMed. Effects of ovariectomy and estrogen and androgen treatment on sildenafil-mediated changes in female genital blood flow and vaginal lubrication in the animal modelThis is why vaginal dryness is so common during menopause, when estrogen levels drop. It is also why hormonal birth control, which alters estrogen and progesterone levels, can affect lubrication in some users. The system depends on a hormonal backdrop being in place for the nitric oxide–driven arousal response to work well.
Nervous System Signals Behind Arousal
The autonomic nervous system, the part that controls involuntary functions like heart rate and digestion, also orchestrates sexual arousal. A neuropeptide called vasoactive intestinal polypeptide, or VIP, appears to be one of the key chemical messengers. When researchers administered VIP to women, vaginal blood flow increased and lubrication roughly doubled.
6PubMed. Vasoactive intestinal polypeptide (VIP) provokes vaginal lubrication in normal womenVIP is found alongside nitric oxide in the nerve fibers that supply genital blood vessels, suggesting these chemical signals work in concert to produce the vascular changes that lead to lubrication.
7PubMed Central. UK-414,495, a selective inhibitor of neutral endopeptidase, potentiates pelvic nerve-stimulated increases in female genital blood flow in the anaesthetized rabbitThe sympathetic branch of the nervous system, the one associated with the “fight or flight” response, also plays a more nuanced role than you might expect. A study of 52 sexually functional women found that moderate sympathetic activation was associated with higher genital arousal, while very low or very high activation was associated with lower arousal. In other words, a little adrenaline helps; too much shuts things down.
8PubMed Central. Evidence for a curvilinear relationship between sympathetic nervous system activation and women’s physiological sexual arousalThis curvilinear pattern helps explain some everyday experiences. A bit of excitement or novelty can enhance arousal and lubrication, but high anxiety, fear, or stress can suppress it. The sweet spot is somewhere in the middle, which is why feeling safe but stimulated tends to produce the strongest physical arousal response.
9The American Journal of Cardiology. Sympathetic nervous system activity and female sexual arousalThe Vestibular Glands
Near the vaginal opening sit two sets of glands that are often mentioned in discussions about female lubrication. The Bartholin’s glands (greater vestibular glands) are located on either side of the vaginal entrance and produce a small amount of mucus-like fluid. The lesser vestibular glands are smaller and more numerous. Both have long been assumed to contribute to lubrication during arousal, but the evidence for this is surprisingly thin.
A 2025 review noted that while existing literature suggests the vestibular glands play a role in lubrication during sexual arousal, concrete evidence supporting this claim remains sparse. Studies have highlighted secretion patterns and potential involvement in orgasm through specific neurotransmitter receptors, but major knowledge gaps persist, particularly around the blood supply and nerve connections of these glands.
10Sexual Medicine Reviews. Review of the vestibular glands: functional anatomy, clinical significance, and role in sexual functionIn practical terms, the Bartholin’s glands produce a relatively small volume of fluid compared to vaginal transudation. Their contribution is probably more about providing a slippery coating at the vaginal entrance than about generating the bulk of lubrication. Most of the visible wetness during arousal comes from the transudate mechanism described above.
Skene’s Glands and the “Female Prostate”
The Skene’s glands, also called the paraurethral glands, are small structures located around the urethra. These glands are now widely considered to be the female homolog of the male prostate. Immunohistochemical studies have found that about 83% of female paraurethral glands stain positive for prostate-specific antigen (PSA), the same marker used in male prostate cancer screening.
11PubMed. Homology between the female paraurethral (Skene’s) glands and the prostate. Immunohistochemical demonstrationMore recent histological work has reinforced this, showing that the glands within the anterior vaginal wall tissue are innervated and phenotypically similar to male prostate tissue, possibly sharing a common embryonic origin. The researchers noted that the microscopic and chemical features of these glands may indicate a functional role in sexual responses.
12PubMed. The prostate in women: an updated histological and immunohistochemical profile of the female periurethral glands and their relationship to an implanted midurethral slingThe secretion from these glands is what constitutes true female ejaculation. Analysis of this fluid shows it is unlike urine: it contains elevated levels of PSA, prostatic acid phosphatase, and glucose, while having lower creatinine than urine. Its composition actually resembles components of male seminal fluid, minus the sperm.
13PubMed. Does female ejaculation serve an antimicrobial purpose?The thick, whitish appearance of this prostatic secretion is likely what people are most directly describing when they use the word “creaming.” It is produced in small quantities, typically a few milliliters, and tends to appear during or around orgasm rather than throughout arousal the way vaginal lubrication does.
Squirting Is a Separate Phenomenon
Squirting is frequently conflated with the milky ejaculate, but the two are biochemically and mechanistically distinct. A systematic review and meta-analysis confirmed that squirting fluid is a large-volume, clear liquid with high concentrations of urea and creatinine comparable to urine. The median volume was about 60 milliliters, with a range as wide as 15 to 900 milliliters. Real-time ultrasound imaging in multiple studies showed the bladder filling during arousal and emptying completely during the squirting event.
14The Journal of Sexual Medicine. Female Ejaculation, Squirting, and Coital Incontinence: A Systematic Review and Meta-Analysis of Biochemical, Imaging, and Urodynamic Diagnostic CriteriaOne complicating detail: PSA was detected in the squirting fluid of some women even though it was absent from their pre-arousal urine. In one study, PSA was not present in pre-stimulation urine for six of seven participants but was found in the squirting fluid of five of those seven.
15PubMed. Nature and origin of “squirting” in female sexualityThis suggests that during orgasm, the prostatic secretion from the Skene’s glands can mix with the bladder-origin fluid. So squirting fluid is primarily dilute urine but may contain traces of the true ejaculatory secretion. This mixing is probably why some squirting fluid has a slightly different odor or appearance than plain urine, and why the biochemistry of these fluids can look messy when you try to draw a bright line between them.
What Happens During Orgasm
The pelvic floor muscles play a direct role in the expulsion of fluid during orgasm. Research measuring contraction pressures simultaneously in the vaginal and anal canals found that near the perceived start of orgasm, a series of regular, synchronized contractions began. The contractions occurred in both locations at the same rate, with the interval between them increasing by about a tenth of a second as the series progressed.
16PubMed. The female orgasm: pelvic contractionsThese contractions can physically push fluid out of the vaginal canal, which is why the visible “creaming” effect is often most pronounced during or immediately after orgasm. The rhythmic squeezing of the pelvic floor also applies pressure to the Skene’s glands and the surrounding tissue, which may help express the prostatic ejaculate. For women who experience squirting, the same contractions can contribute to the expulsion of fluid from the bladder.
Women typically do not experience a mandatory refractory period the way men do after ejaculation. Repeated orgasms with minimal delay between them are physiologically possible, and some women can experience serial orgasms numbering in the dozens. This means fluid production can continue or recur across multiple orgasmic peaks in a single session.
The Sensitive Zone on the Front Vaginal Wall
The area sometimes called the G-spot sits on the front (anterior) wall of the vagina, roughly behind the pubic bone. This region overlies the Skene’s glands and the surrounding tissue, and stimulation of it is commonly associated with both intense arousal and ejaculation. However, the anatomical evidence for a discrete “spot” with a unique nerve cluster is contested.
One study that mapped nerve fibers, nerve bundles, and blood vessels across the anterior vaginal wall found fairly regular distribution, with no concentrated site in the paraurethral region.
17PubMed. Search for the G spot: microvessel and nerve mapping of the paraurethral anterior vaginal wallOther research, however, has identified a complex of tissue that expands and elevates the anterior vaginal wall in all subjects examined, and whose features were consistent across cadaveric specimens.
18PubMed. Anatomic documentation of the G-spot complex role in the genesis of anterior vaginal wall ballooningA more recent framework proposes that rather than a single spot, the entire anterior vaginal region functions as a continuous zone of heightened sensitivity, with dense mechanosensory, vascular, and connective tissue integration throughout. This view reframes the debate: the question may not be whether a G-spot exists but whether a broader region of the anterior wall is functionally specialized for sexual response.
19PubMed Central. From the G-spot to the H-zone (Haddad Zone): Exploring an Anatomical, Neurovascular, and Regenerative Framework for Female Sexual FunctionFrom a practical standpoint, stimulation of the front vaginal wall remains one of the most commonly reported triggers for both the thick ejaculatory fluid and squirting, regardless of whether the mechanism involves a discrete anatomical structure or a distributed sensitive zone.
How Common Are Ejaculation and Squirting
Prevalence estimates depend heavily on how the question is asked, but the numbers are higher than many people assume. A U.S. probability sample found that about 40% of adult women reported having squirted at least once in their lifetime, with a median frequency of three to five times.
20PubMed. Vaginal Squirting: Experiences, Discoveries, and Strategies in a U.S. Probability Sample of Women Ages 18-93A Swedish cross-sectional study found an even higher figure: 58% of participants had experienced ejaculation or squirting. Among those who had experienced it, the occurrence was consistent during sexual activity for only about 7%, while about half said it had happened on just a few occasions. Non-heterosexual women reported the experience significantly more often.
21PubMed Central. Women’s experiences of female ejaculation and/or squirting: a Swedish cross-sectional studyThe same Swedish study captured something important about how women actually feel about it. About 77% rated the experience as primarily positive, and 61% reported that orgasm occurred close to or simultaneously with the fluid expulsion, which was associated with a more positive perception. But 28% reacted with shock or shame the first time, and 26% initially thought they had urinated. Even among those who found it positive overall, 58% had wanted to avoid it at some point because of the mess or uncertainty about what the fluid was.
21PubMed Central. Women’s experiences of female ejaculation and/or squirting: a Swedish cross-sectional studyWhy the Amount and Appearance Vary So Much
Several factors affect how much fluid is produced and what it looks like. Estrogen levels are a major one: because lubrication depends on estrogen-maintained tissue health and blood flow, anything that shifts estrogen levels, from the menstrual cycle to breastfeeding to menopause to hormonal contraception, can change the quantity and consistency of vaginal fluid. Around ovulation, when estrogen peaks, cervical mucus tends to be clear and stretchy, while at other points in the cycle it can be thicker and more opaque.
Hydration matters too, since the transudate is essentially filtered blood plasma. Dehydration reduces plasma volume and can make lubrication scantier. Medications with anticholinergic or antihistamine effects, which include many common allergy medications, antidepressants, and some blood pressure drugs, can reduce secretions throughout the body, including vaginal fluid.
The size of the Skene’s glands also varies between individuals. Some women have prominent, well-developed glands; others have minimal glandular tissue. This anatomical variation likely explains why some women produce noticeable ejaculatory fluid and others do not, regardless of arousal level or orgasm intensity. It is a structural difference, not a performance issue.
Arousal and Lubrication Do Not Always Match
One of the most persistent misconceptions is that the amount of visible fluid is a reliable indicator of how aroused someone is. Research on arousal concordance, the agreement between physical genital response and subjective feelings of desire, has consistently shown that the two are only loosely connected in women. A woman can feel deeply aroused and produce little visible lubrication, or produce substantial lubrication while not feeling particularly turned on mentally.
This mismatch can create real problems in sexual encounters when partners interpret wetness as a green light or dryness as disinterest. The biology simply does not work that way. Lubrication is a physiological reflex driven by blood flow, nerve signals, and hormonal status. It is influenced by arousal but not controlled by it in a simple, proportional way. Using external lubrication when needed is a practical solution, not an indication that something is wrong.
The autonomic nervous system’s role reinforces this point. Because the sympathetic and parasympathetic branches are both involved, and because factors like stress, fatigue, alcohol, and medication can shift their balance, the physical arousal response has many inputs beyond sexual desire. Someone who is psychologically excited but physically tense from a stressful day may find their body slower to respond, while a relaxed but only mildly interested person might lubricate readily.
The Antimicrobial Hypothesis
One underexplored line of research asks whether female ejaculate serves a protective function beyond lubrication. The observation that the prostatic secretion contains PSA, prostatic acid phosphatase, and glucose, components also found in male seminal fluid, has led researchers to hypothesize that it may have antimicrobial properties. Male prostatic fluid has known antimicrobial activity, and if the female version is chemically similar, it could function as a defense against urinary tract infections or other pathogens introduced during intercourse.
13PubMed. Does female ejaculation serve an antimicrobial purpose?This remains a hypothesis rather than established fact, but it fits with the broader pattern of the urogenital tract having multiple overlapping defense mechanisms. The acidic pH of normal vaginal fluid, maintained by lactobacilli in the vaginal microbiome, already serves as one antimicrobial barrier. If the ejaculatory fluid adds another layer, it could help explain why the Skene’s glands persist as functional structures despite not being strictly necessary for reproduction.