While you may see an improvement in your erections from this technique, don’t expect a huge size boost. Men who had STIM shots gained only about .2 inches in length and girth per injection, and results typically last just two to three months. But repeated treatments could expand the vessels and tissues in your penis and provide longer-lasting results over time.
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.