Many problems in men are closely related to ejaculation. Many couples are often caused by one or another ejaculation disorder, such as ejaculation difficulties, inability to ejaculate, painful ejaculation, retrograde ejaculation, etc. …… So what causes it? For young adults with ejaculation difficulties, they should be corrected in due course, change the doubts of those with ejaculation difficulties, and actively play the role of the female partner in sex therapy, and guide the female partner to use various methods to stimulate the male partner’s sexual excitement in order to achieve ejaculation. Men do not ejaculate? Lack of sexual knowledge mostly Ejaculation difficulties and can not ejaculate although both do not ejaculate during sexual intercourse, can not reach the climax of sexual excitement, but there is a difference in performance: the former by masturbation can ejaculate, while the latter with any way can not ejaculate. Ejaculation is a complex physiological process, and nerve endings and central excitation are two important links, but the former is more important. Primary non-ejaculation (never ejaculated in the vagina) is due to insufficient nerve endings excitement, too high stimulation threshold, and relatively low stimulation intensity to cross this “threshold”. Secondary ejaculation, on the other hand, is caused by psychological factors that strengthen central nervous inhibition. According to the survey, there are many reasons for not ejaculating, mainly due to the lack of sexual knowledge, which accounts for the majority of people. For example, they do not know that during sexual intercourse the penis has to be rubbed continuously in the vagina with a fast frequency and large amplitude, but instead they do not move after long insertion into the vagina. There are also cases where the ejaculation is inhibited because of a dysfunction of the cerebral cortex or when an erotic orgasm should be reached instead. Also, in case of organic lesions in a certain part of the body, such as penile circumcision, foreskin impaction, genital malformation, obstruction of the seminal pathway, and in patients with spinal cord injury, non-ejaculation may occur. In addition, the use of antipsychotic drugs can also cause the phenomenon of non-ejaculation.