Cycle Sex
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Cycle Sex
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Four-stage model of physiological responses to sexual stimulation
^ Jump up to: a b c d e f g h i j k l m n o p John Archer; Barbara Lloyd (2002). Sex and Gender . Cambridge University Press . pp. 85 –88. ISBN 0521635330 . Retrieved August 25, 2012 .
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^ Gray, JP (June 1980). "Cross-Cultural Factors Associated with Sexual Foreplay". The Journal of Social Psychology . 111 (1): 3–8. doi : 10.1080/00224545.1980.9924266 . PMID 2818169 .
^ The Journal of Sexual Medicine , Vol 3, May 2006. by Roy Levin.
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^ See 133–135 Archived April 2, 2016, at Wikiwix for orgasm information, and page 76 for G-spot and vaginal nerve ending information. Rosenthal, Martha (2012). Human Sexuality: From Cells to Society . Cengage Learning . ISBN 978-0618755714 .
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^ Jump up to: a b Rathus, Spencer A.; Nevid, Jeffrey S.; Fichner-Rathus, Lois; Herold, Edward S.; McKenzie, Sue Wicks (2005). Human Sexuality In A World Of Diversity (Second ed.). New Jersey, US: Pearson Education.
^ Rachel Nuwer (1 July 2016). "The enduring enigma of female sexual desire" . BBC- Future . Retrieved 12 September 2017 .
^ Jump up to: a b c Basson, R. (2000). "The female sexual response: A different model". Journal of Sex and Marital Therapy 26, 51–65.
^ Levin, R. J. (2008). "Critically revising aspects of the human sexual response cycle of Masters and Johnson: Correcting errors and suggesting modifications". Sexual and Relationship Therapy 23(4), 393-399.
^ Jump up to: a b Chivers, Meredith; Bailey, JM (October 2005). "A sex difference in features that elicit genital response". Biological Psychology . 70 (2): 115–120. doi : 10.1016/j.biopsycho.2004.12.002 . PMID 16168255 . S2CID 7637198 .
^ Chivers, Meredith (November 2005). "A brief review and discussion of sex differences in the specificity of sexual arousal". Sexual and Relationship Therapy . 20 (4): 337–390. doi : 10.1080/14681990500238802 . S2CID 44451821 .
^ Chivers, Meredith; Seto, Michael; Blanchard, Ray (2007). "Gender and Sexual Orientation Differences in Sexual Response to Sexual Activities Versus Gender of Actors in Sexual Films" (PDF) . Journal of Personality and Social Psychology . 93 (6): 1108–1121. doi : 10.1037/0022-3514.93.6.1108 . PMID 18072857 . Retrieved 21 August 2018 .
^ Giles, Katie; McCabe, Marita (October 2009). "Conceptualizing women's sexual function: linear vs. circular models of sexual response". Journal of Sexual Medicine . 6 (10): 2761–2771. doi : 10.1111/j.1743-6109.2009.01425.x . PMID 19686428 .
^ Levin, R. (2008). "Critically revisiting aspects of the human sexual response cycle of Masters and Johnson: Correcting errors and suggesting modifications". Sexual and Relationship Therapy 23(4), 393-399.
^ Rosenberg, M. T., Hazzard, M. A., Tallamn, C. T., & Ohl, D. A. (2006). "Is the amount of physical pleasure with ejaculation related to volume or strength and force of ejaculation?" The Journal of Sexual Medicine 3(s1), 14-69.
^ Hartman, W. & Fithian, M. (1984). Any Man Can: The Multiple Orgasmic Technique for Every Loving Man . New York: St. Martin's Press.
^ Zilbergeld, B. (1992). The New Male Sexuality . New York: Bantam Books.
^ Both, S., Everaerd, W., Laan, E. (2003). "Modulation of spinal reflexes by aversive and sexually appetitive stimuli". Psychophysiology , 40, 174-183.
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^ Robinson, P. The Modernization of Sex: Havelock Ellis, Alfred Kinsey, William Masters and Virginia Johnson . New York: Harper & Row, Publishers, 1976
^ Laan, E. & Both, S. (2008). "What makes women experience desire?" Feminism & Psychology 18(4), 505-514.
^ Jump up to: a b Giles, K. R. & McCabe, M. P. (2009). "Conceptualizing women's sexual function: Linear vs. circular models of sexual response". The Journal of Sexual Medicine 6, 2761-2771.
^ Sidi, H., Naing, L., Midin, M., and Nik Jaafar, N. R. (2008). "The female sexual response cycle: Do Malaysian women conform to the circular model?" The Journal of Sexual Medicine 5, 2359–2366.
^ Masters, W. H. & Johnson, V. E. (1970). Human Sexual Inadequacy . Toronto; New York: Bantam Books.
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The human sexual response cycle is a four-stage model of physiological responses to sexual stimulation , [1] which, in order of their occurrence, are the excitement , plateau, orgasmic , and resolution phases. This physiological response model was first formulated by William H. Masters and Virginia E. Johnson , in their 1966 book Human Sexual Response . [1] [2] Since that time, other models regarding human sexual response have been formulated by several scholars who have criticized certain inaccuracies in the human sexual response cycle model.
The excitement phase (also known as the arousal phase or initial excitement phase ) is the first stage of the human sexual response cycle, which occurs as a result of physical or mental erotic stimuli , such as kissing , making out , fantasizing or viewing erotic images , that leads to sexual arousal . During this stage, the body prepares for sexual intercourse , initially leading to the plateau phase. [1] There is wide socio-cultural variation regarding preferences for the length of foreplay and the stimulation methods used. [3] Physical and emotional interaction and stimulation of the erogenous zones during foreplay usually establishes at least some initial arousal. [ citation needed ]
Among both sexes, the excitement phase results in an increase in heart rate, breathing rate, and a rise in blood pressure . [1] A survey in 2006 found that sexual arousal in about 82% of young females and 52% of young males arises or is enhanced by direct stimulation of nipples , with only 7–8% reporting that it decreased their arousal. [4] Vasocongestion of the skin, commonly referred to as the sex flush , will occur in approximately 50-75% of females and 25% of males. The sex flush tends to occur more often under warmer conditions and may not appear at all under cooler temperatures.
During the female sex flush, pinkish spots develop under the breasts, then spread to the breasts, torso, face, hands, soles of the feet, and possibly over the entire body. [1] Vasocongestion is also responsible for the darkening of the clitoris and the walls of the vagina during sexual arousal. During the male sex flush, the coloration of the skin develops less consistently than in the female, but typically starts with the epigastrium (upper abdomen), spreads across the chest, then continues to the neck, face, forehead, back, and sometimes, shoulders and forearms. The sex flush typically disappears soon after orgasm occurs, but this may take up to two hours or so and, sometimes, intense sweating will occur simultaneously. The flush usually diminishes in reverse of the order in which it appeared. [2]
An increase in muscle tone ( myotonia ) of certain muscle groups, occurring voluntarily and involuntarily, begins during this phase among both sexes. [2] [ clarification needed ] Also, the external anal sphincter may contract randomly upon contact (or later during orgasm without contact).
In males, the beginning of the excitement phase is observed when the penis becomes partially or fully erect , often after only a few seconds of erotic stimulation. [1] The erection may be partially lost and regained repeatedly during an extended excitement phase. Both testicles become drawn upward toward the perineum , notably in circumcised males where less skin is available to accommodate the erection. Also, the scrotum can tense and thicken during the erection process.
In females, the excitement phase can last from several minutes to several hours. The onset of vasocongestion results in swelling of the woman's clitoris, labia minora and vagina. The muscle that surrounds the vaginal opening grows tighter and the uterus elevates and grows in size. The vaginal walls begin to produce a lubricating organic liquid . [1] Meanwhile, the breasts increase slightly in size and nipples become hardened and erect.
The plateau phase is the period of sexual excitement prior to orgasm . The phase is characterised by an increased circulation and heart rate in both sexes, increased sexual pleasure with increased stimulation and further increased muscle tension. Also, respiration continues at an elevated level. [1] Prolonged time in the plateau phase without progression to the orgasmic phase may result in sexual frustration .
During this phase, the male urethral sphincter contracts (so as to prevent urine from mixing with semen , and to guard against retrograde ejaculation ) and muscles at the base of the penis begin a steady rhythmic contraction. [1] Males may start to secrete seminal fluid or pre-ejaculatory fluid and the testicles rise closer to the body. [2]
The plateau stage in females is basically a continuation of the same changes evident in the excitement stage. The clitoris becomes extremely sensitive and withdraws slightly, and the Bartholin glands produce further lubrication . The tissues of the outer third of the vagina swell, and the pubococcygeus muscle tightens, reducing the diameter of the opening of the vagina. [1] Masters and Johnson refer to the changes that take place during the plateau stage as the orgasmic platform . For those who never achieve orgasm, this is the peak of sexual excitement.
Orgasm is experienced by both males and females, ending the plateau phase of the sexual response cycle. Orgasm is accompanied by quick cycles of muscle contraction in the lower pelvic muscles , which surround both the anus and the primary sexual organs . [ clarification needed ] Orgasms are often associated with other involuntary actions, including vocalizations and muscular spasms in other areas of the body and a generally euphoric sensation. Heart rate is increased even further. [1] Tantric sex practices may seek to diminish the goal of achieving orgasm, which is frequently a common goal of sexual intercourse.
In males, orgasm is usually associated with ejaculation . Each ejection is accompanied with continuous pulses of sexual pleasure, especially in the penis and loins . [1] Other sensations may be felt strongly among the lower spine or lower back. The first and second convulsions are usually the most intense in sensation and produce the greatest quantity of semen. Thereafter, each contraction is associated with a diminishing volume of semen and a milder sensation of pleasure. [1]
Women also experience uterine and vaginal contractions . Orgasms in females can vary widely from individual to individual. They are commonly associated with an increase in vaginal lubrication , a tightening of the vaginal walls and overall pleasure. [1] For some women, there is also a possibility of female ejaculation (also called "squirting").
The resolution phase occurs after orgasm and allows the muscles to relax, blood pressure to drop and the body to slow down from its excited state. [1] The refractory period, which is part of the resolution phase, is the time frame in which usually a man is unable to orgasm again, though women can also experience a refractory period.
Masters and Johnson described the two-stage detumescence of the penis: In the first stage, the penis decreases from its erect state to about 50 percent larger than its flaccid state. This occurs during the refractory period. In the second stage (and after the refractory period is finished), the penis decreases in size and returns to being flaccid. [2] It is generally impossible for men to achieve orgasm during the refractory period. [2] [5] [6] Masters and Johnson argue that this period must end before men can become aroused again. [7]
Although, due to the refractory period, it is rare for men to achieve multiple orgasms , [8] [9] some men have reported having multiple, consecutive orgasms, particularly without ejaculation. [10] Multiple orgasms are more commonly reported in very young men than in older men. [10] In younger men, the refractory period may only last a few minutes, but last more than an hour in older men. [11]
According to Masters and Johnson, women have the ability to orgasm again very quickly, as long as they have effective stimulation. As a result, they are able to have multiple orgasms in a relatively short period of time. [2] [7] Though generally reported that women do not experience a refractory period and thus can experience an additional orgasm, or multiple orgasms, soon after the first, [5] [6] some sources state that men and women experience a refractory period because women may also experience a period after orgasm in which further sexual stimulation does not produce excitement. [12] [13] For some women, the clitoris is very sensitive after climax, making additional stimulation initially painful. [14] After the initial orgasm, subsequent orgasms for women may also be stronger or more pleasurable as the stimulation accumulates. [14] [15]
Masters and Johnson argue that, despite some minor differences, sexual responses in both men and women are fundamentally similar. [1] [2] However, researchers have argued that there are many differences between men and women in terms of their response. First, Masters and Johnson put forth one model for men, but three different models for women. They stated that men's sexual response only differs in terms of duration; showing different models would, thus, be repetitive. Women, on the other hand, they state can have responses that differ in both intensity and duration. [2] These variations can pose problems because psychologists have argued that not everyone fits this model; for example, most women do not orgasm during penetrative sexual intercourse. [16] Masters and Johnson also equate a man's erection with a woman's vaginal lubrication during the excitement phase; Roy Levin states that this observation is false. A woman's clitoris is the anatomical parallel to a man's penis. As a result, clitoral swelling would be the equivalent of a man's erection. [17]
Another aspect is the lack of concordance between subjective sexual arousal and genital arousal. Research by Meredith L. Chivers and J. Michael Bailey indicates that men tend to show category-specific arousal; that is, they are sexually aroused by their preferred gender. However, women show category non-specificity: Their genitals show arousal to both preferred and non-preferred genders. [18] [19] Even though women reported being subjectively aroused to, for example, a man and woman engaging in sexual activity, their genitals also show sexual arousal to two men engaging in sexual activity, two women doing so, and even non-human animals having sex. [20]
Overall, Masters and Johnson's model appears to be a better example of men's sexual response than women's. [21]
There has been much research conducted based on Masters and Johnson's model. However, inaccuracies have been found in the descriptions of the stages of sexual response. For example, Roy Levin identified a few areas of the model that had not been touched upon. [22] First, Masters and Johnson state that only the vagina is lubricated during the arousal stage; Levin argues that the labia produce their own lubricant. Levin also presents research which shows that the first signs of physiological arousal in women is increased blood flow to the vagina, not lubrication. He also dispels information about men and their sexual response; Masters and Johnson report that pleasure was positively associated with the volume of ejaculate released, but Rosenberg, Hazzard, Tallman and Ohl gave a group of men a questionnaire and found that significantly more men reported that physical pleasure was associated with the strength of the ejaculation compared to the volume. [23] Moreover, some researchers have found that some men can have multiple orgasms, despite what Masters and Johnson had reported. [24] [25]
Some researchers have also criticized how Masters and Johnson define sexual response solely in terms of physiology; for example, Everaerd, and Laan have found that sexual arousal can be defined as an emotional state in both men and women. [26] Other researchers have stated that there is a lack of concordance between women's subjective sexual arousal and their genital arousal. [16] [18] Rosemary Basson argues that this model poorly explains women's sexual response, especially for those who are in long-term relationships. [16] [27]
Shortly after Masters and Johnson published their book, several scholars criticized their model of the human sexual response cycle. For example, Helen Singer Kaplan argued that Masters and Johnson only evaluated sexual response from a physiological perspective, and that psychological, emotional, and cognitive factors need to be taken into consideration. As a result, she proposed her model of the sexual response cycle which includes
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