Erection problem, Erection Dysfunction (ED) is the major cause of concern today. Most of the men suffer from this problem. Apart from causes, symptoms let us know how erections more actually. During intercourse or making love with your partner, nerves release chemical that helps to increase blood flow into the penis. This blood flows in the erection chambers in the organ, made of spongy muscle tissue which is known as (corpus cavernosum) When you get erection, the spongy tissue relax and trap the blood inside. This blood pressure in the chambers makes the penis firm which is erection. When a man has orgasm, a second set of nerve signals the penis nerve and cause the muscular tissue in the organ to contract and blood is released back into circulatory system and erection comes down.