The causes of premature ejaculation are very complex. A man's ejaculation time is affected by many factors, such as age, physical condition, emotions, and psychology. There are also individual differences in the length of the ejaculation latency period.

In addition, factors like foreskin problems, phimosis, prostatitis, urethritis, excessive and frequent masturbation or sexual intercourse, lack of sexual experience, irregular sexual life, and a long interval between two sexual encounters can all lead to short sexual intercourse time and premature ejaculation.