Alfred Kinsey's reports from the 1940s and 5'0s were the first to reveal brain scans showing that the function of orgasm and ejaculation are governed by two separate parts of a man's brain. Those with a penis can multiply their orgasms, too. Often, women just don't know that they can do it, so they stop at one. Your genitals will already be engorged, which is a prerequisite for climax, so you're already "in the zone." It takes some practice, but it's helpful to know that it's entirely physiologically possible for anyone to have multiple orgasms. With a clitoris, the most successful method I've learned and taught is to go for the second and subsequent orgasm within a minute of the first, using the same technique (e.g., stroking) as before. For muscle strengthening, squeeze 10 to 30 times, not more than three times a day, varying the duration and power of the squeeze.
The more you practice squeezing and holding the PC on your own, the better control you will have with your PC muscle during sexual activity. Prolonging an orgasm can be done by squeezing the PC to pause the sensation of orgasm, then releasing the contraction to continue the flow of pleasure. Squeeze it when aroused in order to intensify pleasure, to stop an orgasm, to bring it on, or to prolong it.
So what do we do with the PC muscle? Well, you can squeeze the PC by tensing around your genitals as if to stop urinating or prevent bowel movement. It's no wonder that the perineum is referred to in the Taoist tradition as the hui-yin, or "power center" of our sexual bodies. These signals travel through the spinal cord to the brain, stimulating the prostate in the male and the uterus in the female and releasing pleasurable endorphins. Stifter writes that the muscle of your pelvic floor, called the pubococcygeal muscle (PC), sends measurable electronic signals when repeatedly contracted, unlike any other muscle in the entire body. In the book The Sexology of the Vaginal Orgasm, author Karl F.