What is PC muscle: that is, pubococcygeus caudalis, a bundle of pelvic floor muscles around the urethra and anus, was first proposed in 1952 by the American doctor Kegel for the diagnosis and treatment of female stress urinary incontinence, which can effectively improve the pressure of female urethral closure, and its mechanism is to prevent urine leakage due to weak PC muscle. Recent studies have shown that the weakened ejaculatory force in men is the result of a weakened pelvic floor and ejaculation-related muscles, in particular the PC muscle plays an important role, which is also related to factors such as age, body mass and excessive obesity. The ejaculatory weakness is often clinically lacking in specific drugs, unlike impotence and premature ejaculation, and these men who visit the clinic often complain that the semen is not ejaculated, but “flows out” or “slips out”, and is accompanied by a reduced ejaculatory pleasure and orgasm or even The ejaculatory pleasure and orgasm may even disappear. The actual PC muscle can be used to improve ejaculation strength and sexual pleasure after a long time. （The specific method can take the urination interruption method: that is, each time you urinate in the middle of a few deliberate pauses, wait a few moments to urinate again, in three or so will urinate clean, so repeatedly practice, some people’s ejaculation control can be enhanced, significantly prolonged intercourse time. Some experts and scholars have also proposed the “towel training” method: that is, in the shower, make the penis erect, and then put a light and heavy towel on top of the penis, light and heavy to the penis can fully withstand as appropriate. At this time, through the active contraction of the perineal muscles to raise the penis, which is a kind of exercise process, each time arranged for about ten minutes (300 times), can be divided into two groups, one to two groups per day, or every other day, and then according to their own situation, adhere to the training, and gradually adjust the intensity and frequency of training for themselves. In addition, in the non-erectile state, such as rest, reading, waiting for the bus, etc., can also be “anal retraction” exercise to improve the strength and intensity of the PC muscle, two groups per day, each group of 200-300 times or so. This connection, adhere to 1-2 months, most of them will have significant progress.