The answer is yes, long-term smoking and drinking can affect sexual function. Numerous studies have confirmed that smoking is a high risk factor for erectile dysfunction (ED), and that the proportion of smokers in the ED population is significantly higher than in the normal population of the same age group. The more cigarettes smoked, the longer the smoking age, the higher the proportion of ED occurs. 1, smoking can cause hardening or narrowing of the penile arteries. Long-term smoking pubic will induce internal arteries and penile cavernous arteries will be hardened and narrowed, significantly reducing the amount of blood supply to the penis, the harmful substances in cigarettes will adhere to the walls of the arterial blood vessels, eventually causing blood flow is blocked, so that since the blood will be blocked, including the blood supply to the penis will be insufficient, there will be inadequate erection or erectile dysfunction. 2, the impact of smoking on penile nerve control. Penile erection depends on the nerve endings release of neurotransmitters to play a role, these neurotransmitters let the penile cavernous smooth muscle relaxation and penile congestion. Among them, nitric oxide NO transmitters have the greatest effect on promoting penile erection. The study confirmed that long-term smoking, NO content in the penile sponge will be significantly reduced, leading to ED. in addition, the nicotine in the cigarette has paralyzed and inhibited the role of plant nerves, long-term, a large number of smoking makes the paralyzed nerves can not recover, and then trigger the decline of nerve function, will reduce the ability to perceive sexual stimulation, even if the sexual central nerve is inhibited, can not be excited. 3, the impact of smoking on sex hormones. Sex hormones, especially testosterone, are essential to ensure penile erection. The toxic substances in cigarettes destroy the interstitial cells in the testes, thus decreasing androgen secretion and leading to a decrease in sexual desire and erectile function. However, it is not possible to generalize whether fine wine helps or defeats sex. A moderate amount of sips can improve the quality of sex life. However, those who drink alcohol in excess for a long time will have lower libido and reduced sexual performance. Clinical observation shows that about 40% of men with chronic alcoholism suffer from erectile dysfunction and 5% to 10% suffer from ejaculation disorder.