JAKARTA - In the 1960s, sex researchers William Masters and Virginia Johnson identified four phases of sexual arousal in which each had a unique effect on the body.
Reporting from the Medical News Today page, Thursday, November 16, their research led to the general use of the following four categories to explain the sexual response, namely:
During the phase of desire, tissue in the penis, vagina, pelvic, vulva, and clitoris are filled with blood. This increases the sensitivity of nerves in the body area. This blood flow also produces a liquid called transfat, which lubricates the vagina. The muscles all over the body start to contract. Some people breathe faster or their skin changes red because of increased blood flow.
While in the plateau phase, a person's sexual arousal will continue to increase. The vagina, penis, and clitoris become more sensitive. Each person will experience variations in sensitivity and passion during this period. Passion and interest can decrease, increase, then decrease again.
With the right stimuli and mental conditions, orgasm will be felt soon. For most women, clitoris stimulation is the fastest and most effective way to an orgasm. Meanwhile, men may require a rather long stimulation on the stem or penis head.
Most men experience ejaculation during orgasm, but there is a possibility to have an orgasm without ejaculation. Some women also experience ejaculation during orgasm, although the content of this fluid is still a material for scientific discussion.
Both men and women experience intense muscle contraction during orgasm. Men contract in rectum, penis, and pelvic, while women experience it in the vagina, uterus, and rectum. Some people experience contractions throughout the body.
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After orgasm, the muscles relax and the body slowly returns to a condition before passion. This process is different for men and women. Although most men cannot immediately have an orgasm after ejaculation, many women can experience it. During the resolution stage, most men and women experience a period of refraction. In this period, people will not respond to sexual stimulation.
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