Exercise your pelvic floor. You may not be able to build up the penis itself through exercise, but if you strengthen your pelvic floor your body will be better able to hold blood in your penis. The pelvic floor presses on the vein that keeps blood from leaving the penis during erections. You can strengthen your pelvic floor using Kegel exercises. A trial conducted in Britain concluded that men who performed Kegel exercises experienced better sexual function than those who made other lifestyle changes but didn't perform the exercises.
Penis enlargement is defined as all means and methods used to temporarily or permanently increase the size of the erect penis and its erectile tissue. Often the word is used in conjunction with a surgical penis enlargement, but it is not limited to surgical means and also includes manual training like jelqing, certain foods and supplements, devices and pumps to stretch the penis.
Stretching with weights. Weights or stretching exercises won't bulk up your penis -- it's not a muscle. But hanging weights off your flaccid penis may stretch it a bit, O'Leary says. The catch is that it requires a freakish degree of dedication. "You might have to wear a weight strapped to your penis eight hours a day for six months," says O'Leary. At the end of it, you could be lucky enough to gain about half an inch. Risks include tearing of the tissue, burst blood vessels, and other problems.