There are many reasons why a man can’t ejaculate, such as low glans sensitivity, retrograde ejaculation, impotence and so on. 1. Low sensitivity of the glans: a man can’t ejaculate because the sensitivity of the glans is too low, resulting in dull sensation, and still no ejaculation after a long period of coitus. 2. Retrograde ejaculation: some men may have ejaculation sensation, movement, etc., but the semen is not ejaculated from the urethra, but retrograde reflux of semen to the seminal vesicles. This kind of patients need to be examined and treated actively to prevent affecting fertility. 3. Impotence: Some men have high penile hardness at the beginning of coitus, but after a short period of time there is weakness, and sexual life may be interrupted, leading to ejaculation problems. There are many other reasons that can lead to the performance of a man’s inability to ejaculate, such as some people have diabetes, neurological disorders, spinal cord injuries, pelvic surgery, prostate hyperplasia surgery, and so on, can also lead to non-ejaculation. There are a small number of people frequent excessive unscientific masturbation can also lead to sexual life without ejaculation. It is recommended that these patients go to a regular hospital to get a clear picture of the cause and actively deal with it.