Function is a complex physiological process, involving various aspects, such as nerve, mental factor, endocrine function, organ, etc., in which the brain cortex sexual reflex plays a particularly important role. Thus, the causes of male sexual dysfunction is also various, generally can be divided into two major categories of organic functional sexual dysfunction and sexual dysfunction, the former accounts for the vast majority of sexual dysfunction, while the latter are rare.Function is a complex physiological process, involving various aspects, such as nerve, mental factor, endocrine function, organ, etc., in which the brain cortex sexual reflex plays a particularly important role. Thus, the causes of male sexual dysfunction is also various, generally can be divided into two major categories of organic functional sexual dysfunction and sexual dysfunction, the former accounts for the vast majority of sexual dysfunction, while the latter are rare.Function is a complex physiological process, involving various aspects, such as nerve, mental factor, endocrine function, organ, etc., in which the brain cortex sexual reflex plays a particularly important role. Thus, the causes of male sexual dysfunction is also various, generally can be divided into two major categories of organic functional sexual dysfunction and sexual dysfunction, the former accounts for the vast majority of sexual dysfunction, while the latter are rare.