The short duration of intercourse may be due to premature ejaculation, which may be caused by psychological factors, organic lesions, and oversensitivity of penile nerves. 1. Psychological factors: the existence of unpleasant sexual experiences, husband and wife relationship discord and other factors, may lead to men’s psychological state is affected, in the sexual life will be prone to premature ejaculation, after adjusting the psychological state, may be gradually recovered. 2. Organic lesions: When there are some organic lesions, such as prostatitis and glabellitis, premature ejaculation is easy to occur during sex, which may be accompanied by glans itching, pain, perineum swelling and pain and other symptoms. 3. Penile nerve hypersensitivity: Penile sensory nerves are oversensitive, which can lead to increased nerve excitability and rapid ejaculation after mild stimulation during sex. There are many reasons for premature ejaculation, including thyroid disease and other endocrine diseases, etc. It is recommended to consult a doctor in time for examination and treatment.