Vacuum pumps are often used to treat erectile dysfunction because they draw blood into the penis, causing it to swell. Some men have tried to use vacuum pumps to increase size, but routinely using a penis pump or using it longer than typically used to treat ED can result in damage to the elastic tissue of the penis, resulting in less-firm erections. Although a vacuum pump may create the illusion of a larger penis at the time, the results are not permanent .
Overall, most studies seem to conclude that women are not overly concerned about penis size. In fact, some studies have reported that 84% of women are very satisfied with the size of their partner’s penis size . In another questionnaire on penis size, 55% of women responded that the length of the penis was unimportant and 22% responded that penis length was totally unimportant. Their opinions about penis girth followed the same trend, although length was found to be less important to women than girth .
Male aging can cause changes in libido and erectile function, and one study found an association between age, testosterone deficiency, and cavernosal fibrosis (shrinkage of the penis). Although the link is tenuous, it still is there, and the study concluded that further studies are needed to determine whether testosterone treatment, alone or along with PDE5 inhibitors (such as Viagra) may reduce the risk of cavernosal fibrosis .