Erectile dysfunction (ED) is what physicians call the inadequate or absent stiffening of the penis despite emotional sexual arousal. More and more men are suffering from such erectile issues. The better we understand the involvement of the central nervous system in various sexual functions, the more we will also understand its determining role in these disorders. Erectile dysfunction are an increasing health problem because of the aging of the population and new effects through readily available pornography (negative effects of chronic over-stimulation) which have an impact on young men.