Ejaculation is the inability to ejaculate during normal intercourse or the absence of sperm and fructose in the post-coital urine examination. According to its cause, it can be divided into functional and organic categories: if ejaculation has never occurred in the waking state, it is called primary ejaculation; those who have a history of ejaculation in the vagina, and then do not ejaculate are called secondary ejaculation. The cause 1, functional non-ejaculation more than a history of coarse emission and non-coital state ejaculation history. (1) Lack of sexual knowledge: often due to the lack of premarital sex education, do not understand the process of sexual intercourse, and inappropriate position during intercourse or do not know that the penis in the vagina need to carry out faster frequency, amplitude of continuous friction, so that the penis stimulation intensity is not enough, and can not ejaculate. Or wrongly believe that sexual life is dirty, dirty and inhibit sexual desire, resulting in insufficient sexual excitement and can not ejaculate. (2) Psychological factors: common in the newlywed tension, excessive worry about the harm of masturbation caused by worry and tension; lack of affection for the spouse or disharmony in the couple’s life; family too crowded and noisy, so that the attention during sexual intercourse, or fear of making a noise, so that the penis friction stimulation intensity is not enough and can not ejaculate. The influence of psychological factors of both men and women, such as fear of pain during sexual intercourse and restrict the friction of the penis, the woman to the man’s cold treatment and other malignant stimuli, can make the man’s sexual impulse frustrated and not ejaculate. (3) ejaculation failure: refers to the man excessive indulgence, frequent sexual intercourse ejaculation, resulting in the ejaculation center in a state of fatigue failure and can not ejaculate. 2, organic non-ejaculation more neurological, endocrine diseases or surgery, trauma history. (1) Neurological lesions and injuries: diseases or surgical removal of the lateral lobes of the brain; injury or surgical removal of the lumbar sympathetic ganglion; spinal cord injury due to various reasons; pelvic surgery, such as prostate removal or curettage, radical surgery for rectal cancer, etc., which causes damage to the nervous system and makes ejaculation dysfunction and non-ejaculation. (2) Endocrine abnormalities: mainly seen in the pituitary gland, gonads, hypothyroidism and peripheral nerve damage caused by diabetes. (3) Diseases of the penis itself: long foreskin, narrow foreskin mouth makes intercourse embedded, producing pain and interrupting intercourse. The foreskin covers the glans due to foreskin, so that the stimulation generated by friction is weakened and does not reach the threshold of ejaculation. In addition, inflammation of the glans penis, allergies, etc. can not tolerate the friction back and forth without ejaculation. (4) pharmacological factors: many drugs can cause ejaculatory dysfunction, such as sedatives, sleeping pills to reduce the excitability of nerves, sexual excitement is also inhibited, adrenergic receptor blockers (guanethidine, phenothiazines). Anti-androgenic drugs (cyproterone acetate, etc.). All can have an inhibitory effect on ejaculation, the extent of this effect on ejaculation is mostly related to the size of the drug and the duration of the drug, the greater the impact of a large amount of drug and a long time, but most of them can be reversed after stopping the drug. (5) Toxic factors: chronic alcoholism, nicotine poisoning and morphine, cocaine, codeine poisoning, etc. can make the poisoned person with low sexual performance and cause non-ejaculation.