China has three smoking-related world firsts: the world’s largest smoking population, the world’s largest cigarette production, and the world’s largest number of premature deaths and fatalities due to smoking. It is well known that smoking is harmful to one’s health. Smoking can inhibit the level of blood testosterone, which reduces libido and even causes erectile dysfunction; it is also believed that nicotine in cigarettes has a vasodilating effect, which strengthens the erection of the penis, but long-term smokers have a damaging effect on the cardiovascular, which will eventually still lead to erectile dysfunction. In 1986, the University of Pridoria, South Africa, investigated the etiology of 116 people with erectile dysfunction and found that 108 were addicts. A city hospital in China investigated 440 people with erectile dysfunction, and found that “smokers” accounted for 64%. The latest survey completed by Action on Smoking and Health in the UK showed that smoking has led to erectile dysfunction in 120,000 men in the UK. Action on Smoking and Health and the British Medical Association recently published a joint report on “Smoking and Erectile Dysfunction” based on the survey. The report states that smoking increases the probability of erectile dysfunction by 50 percent among male smokers between the ages of 30 and 40. The survey found that 88% of smokers were unaware that smoking was associated with sexual dysfunction, and even after being prompted, only 33% of “smokers” were aware of the harmful effects of smoking. Why do smokers cause erectile dysfunction? A Canadian study found that smokers with poor penile blood circulation accounted for 1/4 of the smokers, while the control group was only 1/21, a difference of 5 times. Pathologists believe that nicotine causes 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 erectile dysfunction 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 nonsmokers.