What makes it possible for a man to have sex?
The process of acquiring an erection requires a coordinated effort between a man's nervous system, his arteries and veins, and ultimately his hormones.
This chapter will focus first on how impulses from a man's nerves make it feasible for him to respond sexually. The discussion explores the crucial role of the arteries and veins responsible for regulating blood flow, for it is the power with which blood flows into and the swiftness with which blood exits a man's penis that determines whether he will acquire, maintain, or lose his erection.
Later on in Chapter 12, we will explore the role of hormones and their influence on a man's sexuality.
|1.||Sexually aroused by erotic images or sensations -- these are spontaneous, or psychogenic, erections.|