A. age factor: 50 years old later along with the age growth, also gradually will decrease to the sexual desire request. This is the natural aging objective law, but the sexual desire undulatory property is big, in the different race, the different time, by the different environment, has the very wide difference.
B. energetic factor: Because some people lack to the sexual knowledge, because often the masturbation either the disposable junction defeat, or thought that a drop fine was equal to ten drop of blood, thought the seminal fluid precious regrets not and, under the carry-over the sexual intercourse semination, the patient decreases gradually to the sex life request or completely deficient. Some husbands and wives the sentiment not harmonious or the sex life consistent coordination not harmonious creates, some fear bride’s side is pregnant, the childbirth, some have to the sex life plants not the correct view, thought that is lascivious, the obscene behavior, because on the contrary some sex life has made a mistake, in the spirit has the taking the blame feeling, or the spirit receives the wound and so on, cerebral cortex’s sexual desire main center has received excitedly suppresses.
C. disease factor: The body weak, is excessively tired, in the old disease to secrete the function change, particularly the testicle secretion gao nine alkone are insufficient, must make the sexual desire to reduce. In addition, liver cirrhosis, the congested heart fade, pituitary gland organism to drop, the thyroid gland hypofunction, moreover diseases and so on menopause, chronic kidney function failure, certain medicines for example: The antihistamine medicine, the crown heart is even, the clonidine, the attainment are peaceful, the reserpine and so on has the sexual desire to be desolate
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