危机百科:
Human female orgasm
In a human female orgasm, orgasm is preceded by moistening of the vaginal walls, and an enlargement of the clitoris due to increased blood flow trapped in the clitoris's spongy tissue. Some women exhibit a sex flush, a reddening of the skin over much of the body due to increased blood flow to the skin. As a woman comes closer to having an orgasm, the clitoris moves inward under the clitoral hood, and the labia minora (inner lips) become darker. As orgasm becomes imminent, the outer third of the vagina tightens and narrows, while overall the vagina lengthens and dilates and also becomes congested from engorged soft tissue.[11] The uterus then experiences muscular contractions. A woman experiences full orgasm when her uterus, vagina, anus, and pelvic muscles undergo a series of rhythmic contractions. The majority of women consider these contractions to be very pleasurable, although not all sexually active women experience this.
After the orgasm is over, the clitoris re-emerges from under the clitoral hood, and returns to its normal size in less than 10 minutes.
In a disputed study, female orgasm has been linked to education and income, with heterosexual women with post-secondary degrees more likely to reach orgasm than their less-educated counterparts. [12]
The study methodology has been quite disputed. It is based on a computer assisted phone survey of 19,307 Australians. In fact, the abstract of the research states: "Demographic and sexual history variables were comparatively weakly associated with orgasm." Linking demographics to orgasms was not the aim of the research. The actual study barely references the linkage between demographics and orgasm.
- Re: 危机百科posted on 02/06/2007
Interesting. However, this piece of "encyclopedia" missed one important part:
An important part of female orgasm is the rhythmic contraction of the Fallopian tubes (the ducts through which the eggs travel from the ovaries to the uterus). This is caused by a substance in the semen called prostaglandin, which gives the woman the ultimate climax of sexual excitement when the man and the woman "come" together.
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