Simply stated, no. A penis becomes erect when three, two major and one minor, balloons become engorged with blood as a result of a couple tiny valves closing. The penis is not composed of muscle tissue; it is mostly spongy tissue to hold the blood in there when needed. You will find some spots on the net advocating use of suction pumps to increase the capacity and, therefore, the girth. Stay away from them. While pumps have some application for men who cannot get it up, they are not appropriate for enhancement.