The reason why a man’s ejaculation time is getting earlier and earlier is premature ejaculation, clinically the possible reasons are mental factors, prostatitis, circumcision or prepuce and so on. 1. Psychological factors: men’s first sex life or the impact of work and life, may make it appear anxiety, fear, tension and other bad emotions, which will cause men in the sexual life of the penis tolerance decreased and the ejaculation time becomes shorter. 2. Prostatitis: The volume of the prostate gland will increase in people who suffer from this disease, which will cause men to experience discomfort during sexual intercourse or affect the erectile state of the penis, and some men will also experience premature ejaculation, painful urination and other symptoms. 3. Prolonged foreskin or phimosis: If a man has a prolonged foreskin or phimosis, the glans cannot be completely exposed and sensitivity increases, which is clinically manifested as a shortening of ejaculation time. Premature ejaculation may also be caused by other factors, it is recommended that people with related conditions should go to a regular hospital for consultation, so as to carry out targeted treatment.