Ejaculation, generally refers to the discharge of sperm through the urethra. If an external factor constantly stimulates the penis so that the sexual impulse reaches a critical point, spinal reflexes release strong nerve impulses to the ducts, glands, and muscles of the reproductive system, causing ejaculation. Ejaculation consists of two stages: displacement and emission. Ejaculation is the first stage of ejaculation and refers to the process in which semen is in the urethral region of the prostate gland, causing the urethra to produce a pre-ejaculatory feeling of fullness and the inevitable urgency of ejaculation. During sexual arousal, the sympathetic nervous system is excited, and rhythmic contractions occur in the vas deferens, jugular, seminal vesicles, and ejaculatory ducts, while the wall of the caudal ducts of the epididymis contracts, sending spermatozoa into the jugular portion of the vas deferens, which constricts, allowing spermatozoa to enter the urethral portion of the prostate gland, and mixing with secretions from the vesicoureteral glands and the prostate gland to compose the seminal fluid. Ejaculation is the second stage, at the climax of the sexual response cycle. The sympathetic nervous system gradually increases in tone, the penis is in a highly erect state, and the bulbocavernosus muscle, sciatico-cavernosus muscle and pelvic floor muscles contract under the innervation of the pubic nerves, compressing the urethra and causing semen to be ejaculated through the external urethral orifice. After ejaculation men usually experience a period of incontinence during which they cannot ejaculate again. If symptoms such as painful ejaculation, retrograde ejaculation and delayed ejaculation occur, it may indicate the presence of certain diseases, which men need to pay attention to and seek medical treatment in time.