http://story.news.yahoo.com/news?tmpl=stor...masturbation_dc
LONDON (Reuters) - Frequent masturbation, particularly in the 20s, helps prevent prostate cancer (news - web sites) later in life, according to new research.
Australian scientists have shown that the more men masturbate between the ages of 20 and 50, the less likely they are to develop the disease that kills more than half a million men each year.
They suspect that frequent ejaculation has a protective effect against the cancer because it prevents dangerous carcinogens from building up in the gland.