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Rectal orgasm contractions

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The male orgasm consists of the contraction and pulsating most men feel in their penis, prostate and pelvic areas. These sensations are met by increased heart rate, rapid breathing, muscle tensing, anal, sphincter and pubococcygeus muscle muscles at the base of the penis contractions, and an increase in blood pressure, which then result in a massive and sudden release of pressure. Okay, so that is a little technical for something so pleasurable, but, did you know that ejaculation and orgasm are two separate things? Right before orgasm, seminal fluids build up at the base of the penis. This gives the feeling that you are about to ejaculate, or cum. This is the orgasm, and may be experienced as an intense, tightening and tingling sensation, although each man may experience something slightly different.
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The male orgasm: pelvic contractions measured by anal probe.

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Male Orgasm – GOSHH

Pelvic muscle contractions during sexual response can be monitored conveniently by the anal probe method described. Eleven young adult male subjects were each recorded for three sessions of masturbation to orgasm. Electrical signals from an anal pressure probe were automatically digitized by computer. Orgasmic contractions were easily distinguished from voluntary contractions by the steadily increasing intervals and complete muscle relaxation between orgasmic contractions. At orgasm each subject produced a characteristic series of contractions starting abruptly at an intercontraction interval of about 0. Pressure amplitude, representing the force of contractions, increased from the beginning of the regular series to a maximum at the seventh or eighth contraction.
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Vaginal contraction

Eleven nulliparous women manually self-stimulated to orgasm, each on three separate occasions. Pelvic contraction pressure was measured by an anal probe and a vaginal probe simultaneously. Near the perceived start of orgasm, a series of regular contractions began in nine of the women.
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Pelvic muscle contractions during sexual response can be monitored conveniently by the anal probe method described. Eleven young adult male subjects were each recorded for three sessions of masturbation to orgasm. Electrical signals from an anal pressure probe were automatically digitized by computer. Orgasmic contractions were easily distinguished from voluntary contractions by the steadily increasing intervals and complete muscle relaxation between orgasmic contractions.
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