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Singlewomenadultservice Q Single Women Adult Service Women Ar 1 Single Women Adult Service 潮吹的英文版 转自维基百科Female ejaculation（From pedia）
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and nerve supply and during sexual stimulation respond as a unit".[37][38][39]
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Female ejaculation appears in 20th century anthropological works, such as Malinowski's Melanesian study, The Sexual Life of Savages (1929), and Gladwin and Sarason's "Truk: Man in Paradise" (1956). Malinowski states that in the language of the Trobriand Island people, a single word is used to describe ejaculation in both male and female.[40]
Both the male and female discharge are called by the same name (momona or momola), and they ascribe to both the same origin in the kidneys, and the same function, which has nothing to do with generation, but is concerned with lubricating the membrane and increasing pleasure
In describing sexual relations amongst the Trukese Micronesians, Gladwin and Sarason state that "Female orgasm is commonly signalled by urination".[41] Catherine Blackledge[15] (p. 205) provides a number of examples from other cultures, including the Ugandan Batoro, Mohave Indians, Mangaians, and Ponapese. Amongst the Batoro, older women teach the younger women "kachapati" (spraying the wall) at puberty. (See also Chalker 2002 pp. 531–2, Ladas et al. 1983 pp. 74–5)
Controversy, debate and feminist criticism
The debate in the current literature focuses on three threads: the existence of female ejaculation, its source(s) and composition, and its relationship to theories of female sexuality.[12] This debate has been influenced by popular culture, pornography, and physio-chemical and behavioral studies. There is some resistance from feminists to what has been perceived as a male lens in interpreting the data and construct. Often the debate is also tied to the existence of the G-spot;[42][43] stimulation of the anterior vaginal wall involves simultaneous stimulation of the para-urethral tissue, the site of the Skene's glands and ducts and presumed source of the ejaculated fluid, and therefore it has been variously stated that stimulation of this spot results in ejaculation. These tissues, surrounding the distal urethra, and anterior to the vagina, have a common embryological origin to the prostatic tissue in the male.[44][45]
In an extensive survey, Darling and colleagues claim support for the existence of ejaculation,[4] while in a sharply critical response, Alzate[46][47] states that direct experimentation fails to provide any evidence.[48] Alzate states:
the ignorance and/or confusion still prevalent among women about the anatomy and physiology of their sexual organs may make them mistake either vaginal lubrication or stress urinary incontinence for an "ejaculation"
Shannon Bell argues that the debate is confused by the discussion of two separate phenomena.[specify] She comments that Alzate simply dismisses women's subjective experiences in favour of rigorous scientific proof, and is typical of male sexologists withholding the validity of experience from women. Bell's critique lies at the heart of feminist concerns about this debate, namely a tendency to "disregard, reinterpret, and overwrite women's subjective descriptions." For some, she states, it is more a matter of belief than of physiology. Bell further questions why feminists have not been more outspoken in defense of women's control over female ejaculation, pointing out that the literature frames the discussion in only five separate ways; procreation, sexual pleasure, deviance, pathology, and a scientific mystery.[12]
The discussion entered popular culture in 1982 with the publication of the best-selling book The G Spot and Other Recent Discoveries About Human Sexuality, by Ladas, Whipple, and Perry.[49] The book discussed female ejaculation and brought the issue back into discussions of women's sexuality both in the medical community and among the general public.[11][50][51] This was a popular account of three papers by the authors, the previous year, at the suggestion of Alice Khan Ladas.[29][30][31] Rebecca Chalker notes that this book was largely met with scorn, skepticism and disbelief.[11] The chapter on 'Female Ejaculation' is largely based on anecdotal testimony, and illustrates another issue in the debate, the weight placed on anecdotes and small numbers of observations rather than biomedical investigation or clinical trials. Importantly, a number of the women stated that they had been diagnosed with urinary incontinence. The book advances another feminist theory: that because women's pleasure in their sexuality has been historically excluded, the pleasure of ejaculation has been either discounted or appropriated by health professionals as a physiological phenomenon.[52] Whipple continued to publicise her discoveries, including a 9 min video made in 1981 Orgasmic Expulsions of Fluid in the Sexually Stimulated Female.[53] In 1984, the Journal of Sex Research described the debate surrounding female ejaculation as 'heated'.[54] Josephine Sevely then followed up her 1978 study by publishing "Eve's Secrets: A new theory of female sexuality" in 1987, emphasising an integrated rather than fragmented approach to understanding female sexuality, with the clitoris, vagina and urethra depicted as a single sexual organ.[55][56] This not only challenged the traditional fragmentation of female sexuality into clitoral vs. vaginal sensation, but also sexualised the urethra.[12]
The continuing debate is further illustrated in the angry exchange of letters between the author and researchers in the American Journal of Obstetrics and Gynaecology in 2002 following the publication of 'The G-spot: A modern gynecological myth' by Terrence Hines.[51] As of 2007,[5][57] and 2008[56] the existence of a female prostate and of ejaculation are a matter of debate, and articles and book chapters continue to appear with subtitles such as "Fact or Fantasy".[11]
Research
Much of the problem in arriving at a consensus relates to a failure to adopt generally agreed-on definitions[58] or research methodology. Research has used highly selected individuals, case studies, or very small numbers of subjects, making generalization difficult. For instance, much of the research into the nature of the fluid focuses on determining whether it is or contains urine. There are also problems involved in the collection of specimens and issues of contamination. Since the area of interest is para-urethral glands, it is impossible to completely separate the secretions from urine, especially considering that there may be retrograde ejaculation into the urethra towards the bladder. The best current data comes from studies where women have abstained from coitus, and where their own urine is used as a control both pre and post-orgasm. Research has attempted to use chemicals that are excreted in the urine so that any urinary contamination can be detected. Further methodological issues include the fact that the composition of the fluid appears to vary with the menstrual cycle,[59] and that the biochemical profile of the para-urethral tissues varies with age.[60] Other issues relate to the sensitivity and specificity of the markers chosen. The key questions are the source of the fluid produced, and its composition.[33] Some relevant findings have been presented in conferences but never published in peer review journals, and many others are in difficult to access resources.
Relation to urinary incontinence
Towards the later part of the twentieth century, there was significant confusion between female ejaculation and urinary incontinence. In 1982, Bohlen explained the accepted wisdom;[33]
The previously accepted notion that all fluid expelled during a woman's orgasm is urine is now being challenged...sexologists must take care not to assume now that any fluid produced at orgasm is "female ejaculate".
Scientific studies from the 1980s and later have demonstrated that the substance produced is distinct from urine, though it does show similarities such as alkalinity with urine.[7] A recent study of women who report ejaculation found no evidence of any urological problems, suggesting these two conditions (ejaculation and coital incontinence) are quite distinct physiologically, although perhaps not always distinguishable in a particular individual's mind.[citation needed] Davidson's study of 1,289 women found that the sensation of ejaculation was very similar to that of urination.[3] The best evidence indicates that most fluid expelled during female orgasm is urine. One study used urethral catheterization in order to separate urine from orgasmic expulsions from elsewhere in the body. Seven women claiming to have ejaculations expelled large volumes of urine through the catheter at orgasm, and little to no other fluid.[61] No catheterization study has shown large volumes of fluid expelled at orgasm from any source other than the bladder.
It may be important for physicians to establish whether there is in fact any incontinence in women who report ejaculation, to avoid unnecessary interventions.[32][62] It is also important for physicians to distinguish orgasmic ejaculation from vaginal discharges which may require further investigation and treatment. In individual cases, the exact source of any reported discharge may not be obvious without further investigation.
Nature of fluid
Critics have maintained that ejaculation is either stress incontinence or vaginal lubrication. Research in this area has concentrated almost exclusively on attempts to prove that the ejaculate is not urine,[43][63] measuring substances such as urea, creatinine, prostatic acid phosphatase (PAP), prostate specific antigen (PSA),[6] glucose and fructose [64] levels. Early work was contradictory; the initial study on one woman by Addiego and colleagues reported in 1981,[30] could not be confirmed in a subsequent study on 11 women in 1983, [65] but was confirmed in another 7 women in 1984.[66] In 1985 a different group studied 27 women, and found only urine,[46] suggesting that results depend critically on the methods used.
A 2007 study on two women involved ultrasound, endoscopy, and biochemical analysis of fluid. The ejaculate was compared to pre-orgasmic urine from the same woman, and also to published data on male ejaculate. In both women, higher levels of PSA, PAP, and glucose but lower levels of creatinine were found in the ejaculate than the urine. PSA levels were comparable to those in males.[5]
Source of fluid
One very practical objection relates to the reported volumes ejaculated since this fluid must be stored somewhere in the pelvis, of which the urinary bladder is the largest source. The actual volume of the para-urethral tissue is quite small. By comparison, male ejaculate varies from 0.2–6.6 mL (0.04–1.3 tsp) (95% confidence interval), with a maximum of 13 mL (2.6 tsp).[67] Therefore claims of larger amounts of ejaculate are likely to contain at least some amount of urine. The eleven specimens analyzed by Goldberg in 1983,[65] ranged from 3–15 mL (0.6–3.0 tsp).[66] One source states that Skene's glands are capable of excreting 30–50 mL (6–10 tsp) in 30–50 seconds,[54] but it is unclear how this was measured and has not been confirmed. One approach is to use a chemical like methylene blue so that any urinary component can be detected.[66] Belzer showed that in one woman he studied, the dye was found in her urine, but not her orgasmic expulsion.[29]
PAP and PSA have been identified in the para-urethral tissues, using biochemical and immunohistochemical methods, suggesting that the ejaculate likely arises from the ducts in these tissues, in a manner homologous to that in the male.[68][69][7
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