If a man cannot ejaculate during sex, he should look for the causes from many aspects. 1, if he often masturbates and smokes and drinks in daily life, it is easy to have an impact on the reproductive system and the penis cannot be erected or even ejaculate; 2, for men who have frequent sex have difficulty reaching the excitement point again or the penis is weak, they need to pay more attention to rest and avoid frequent ejaculation; 3, if the organism is in Too much stress in daily life, the mental state for a long time in the case of tension, anxiety, may have an impact on the normal reproductive system, the situation of non-ejaculation; 4, because of the mental impact of the hormone level abnormalities, you need to go to the hospital in time to check the sex hormones, according to the cause of the right treatment. It is recommended to develop good habits in life and actively exercise to maintain high energy levels.