He "concluded that satisfaction from penile penetration [is] mainly psychological or perhaps the result of referred sensation".Masters and Johnsons research into the female sexual response cycle, as well as Shere Hites, generally supported Kinseys findings about female orgasm. Masters and Johnsons research on the topic came at the time of the second-wave feminist movement, and inspired feminists such as Anne Koedt, author of The Myth of the Vaginal Orgasm, to speak about the "false distinction" made between clitoral and vaginal orgasms and womens biology not being properly analyzed. Clitoral and vaginal relationships
Accounts that the vagina is capable of producing orgasms continue to be subject to debate because, in addition to the vaginas low concentration of nerve endings, reports of the G-spots location are inconsistent—it appears to be nonexistent in some women and may be an extension of another structure, such as the Skenes gland or the clitoris, which is a part of the Skenes gland. In a January 2012 The Journal of Sexual Medicine review examining years of research into the existence of the G-spot, scholars stated that "[r]eports in the public media would lead one to believe the G-spot is a well-characterized entity capable of providing extreme sexual stimulation, yet this is far from the truth".Possible explanations for the G-spot were examined by Masters and Johnson, who were the first researchers to determine that the clitoral structures surround and extend along and within the labia.
For some women, the clitoris is very sensitive after climax, making additional stimulation initially painful.Masters and Johnson argued that all women are potentially multiply orgasmic, but that multiply orgasmic men are rare, and stated that "the female is capable of rapid return to orgasm immediately following an orgasmic experience, if re-stimulated before tensions have dropped below plateau phase response levels". 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 one, some sources state that both 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. After the initial orgasm, subsequent orgasms for women may be stronger or more pleasurable as the stimulation accumulates. Clitoral and vaginal categories
Discussions of female orgasm are complicated by orgasms in women typically being divided into two categories: clitoral orgasm and vaginal (or G-spot) orgasm. In 1973, Irving Singer theorized that there are three types of female orgasms; he categorized these as vulval, uterine, and blended, but because he was a philosopher, "these categories were generated from descriptions of orgasm in literature rather than laboratory studies". In 1982, Ladas, Whipple and Perry also proposed three categories: the tenting type (derived from clitoral stimulation), the A-frame type (derived from G-spot stimulation), and the blended type (derived from clitoral and G-spot stimulation).