The male sexual ability, not only affects the harmony of sexual life, but also many men’s face, in front of his lover, “penis” can not stand up, which is worse than killing him, however, with the growth of age, men’s physical strength and energy will fade. There are many men will have this feeling: before the young, not to mention a day to do once, even if a day to do three or four times are no problem; however, now this self-confidence is getting weaker and weaker …… alcohol and tobacco beware of impaired sexual performance Smoking: In 1986, the University of Pridoria, South Africa on 116 impotent people to investigate the causes. found that 108 were addicts. A city hospital in China surveyed 440 impotent people and found that “smokers” accounted for 64%. Why do smokers cause impotence? A Canadian research laboratory found that smokers with poor penile blood circulation accounted for 1/4, while the control group accounted for only 1/21, a difference of 5 times. Pathologists believe that alkaline smoke can cause vasoconstriction. Smoking is one of the main causative factors of atherosclerosis, and when the hardening of the small arteries supplying blood to the penis reaches a significant degree, it inevitably leads to a reduction in blood flow to the penis (especially during erection), and impotence is one of the evils it causes. Researchers also found that the percentage of smokers with poorer penile erection strength was significantly higher than that of non-smoking men. Women’s addiction to smoking can also be harmful to the reproductive system. Smoking in women can lead to premature menopause. Also, smoking can cause infertility in women and can damage the fetus, and smoking in pregnant women can increase fetal and perinatal infant mortality by 28%. Alcoholism: For a long time, people have been using wine to cheer and wine to help “sex”, so in the minds of many people always see wine as a sex partner, and, indeed, there are many couples in life before sex like to routinely drink a few glasses. This practice is right or wrong? The main component of wine – the pharmacological effect of alcohol on the human body is roughly divided into four periods: the hazy period, euphoria, anesthesia and respiratory paralysis. In the first two periods, alcohol acts as a stimulant for the central nervous system and the sexual nerves, and drinking small amounts of it does help to eliminate anxiety and relieve physical fatigue. Therefore, after moderate drinking for most people, can play an auxiliary role in cheering and arousal. However, this is only one aspect. If you drink a larger amount of alcohol or although the amount is not large but the tolerance of alcohol is too small, alcohol into the body quickly into the anesthesia period, then, the central nervous system and sexual nerves will have an inhibitory effect, not only can not stimulate lust, but will lead to a decrease in sexual desire, impede the transmission of sexual impulses, and even cause erection difficulties or penile weakness, or cause premature ejaculation, and make sexual intercourse failure. The results of the survey and research also show that alcoholics are mostly chronic alcoholics. Their reproductive system is damaged to varying degrees, sperm viability is significantly reduced, testosterone concentration is reduced, the incidence of impotence of 45%-67%. Alcoholism in women leads to sexual dysfunction, reduced vaginal discharge, painful intercourse, and loss of pleasure and orgasm. Therefore, some people claim that alcohol is the killer of the harmony of sexual life of couples.