A man’s lack of persistence and short ejaculation time is a common symptom in clinical practice, and the main reasons for this include over-excitability of the nerves, circumcision problems, and excessive mental stress. 1. Nerve excitability is too strong: mainly for the first time in the same room or the same room interval is too long, the nerve excitability is strong in the same room, the threshold will be lowered, which will further lead to short ejaculation time. 2. Circumcision problems: mainly including the foreskin is too long or penile, etc., the corresponding condition will cause the glans sensitivity is strong, in the process of coitus is easy to cause early ejaculation. 3. Mental stress: If you have had a bad experience in intercourse, the psychological burden is too great, which will also cause the corresponding situation. Men’s persistent short ejaculation time, will have a great impact on psychological factors, need to consult a doctor in a timely manner, observation and diagnosis of the cause of the standardized treatment.