The complete sexual process consists of foreplay (the period from arousal of sexual desire to erection of the penis after sexual stimulation), substantial intercourse (penile insertion into the vagina, the arrival of sexual pleasure and ejaculation) and afterplay, of which substantial intercourse is of great interest because of its “real” nature. For those who have entered the vagina and started pumping, how long should they hold on to ejaculate before it is considered normal? In the past, there were some misconceptions that a long time is the standard for a “fierce man” and that the longer the erection, the “fiercer” it is. The more time it takes to get an erection, the more local discomfort it will cause, as well as prostatitis, which can cause painful ejaculation, hemorrhage, and even impair erectile function; on the other hand, sex is a couple’s business, and women’s vaginas secrete fluid during sex, which plays a lubricating role. The vaginal pain and even spasm can cause gynecological diseases. And the substantial love time is too long, which will make the couple physically and mentally exhausted and need a longer recovery time after sex; if the female partner is not adapted to the excessive erection time, it may lead to the female partner’s resentment over time and cause sexual frigidity, etc. So erection time is not more than good, too much time in essence has a hundred harm but not a benefit! In a word, don’t judge “heroes” by the length of time! The U.S. Pennsylvania Biland Institute has conducted a survey of thousands of volunteers, and finally found that 7-13 minutes is the “golden length” of substantial intercourse.