Some men seek injections of natural and synthetic fillers to increase the girth of the penis. Others seek surgery if a smaller penis size or penile abnormality (like hypospadias) is interfering with the ability to urinate or quality of life. Small penis size usually is not an indication for surgery to treat infertility. In such cases, assisted fertility procedures may be the better option.
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.