Source Men who frequently masturbate appear to have a lower risk of developing prostate cancer, Australian researchers reported. Researchers from the Cancer Council of Victoria found that men who masturbated more than five times each week were one-third less likely to develop the cancer. The study surveyed 1,000 men who developed prostate cancer and 1,250 who did not, and all were between the ages of 20 and 50, according to a report on Monday on the gay and lesbian news site PlanetOut. Researchers told the BBC last week that the prostate produces one of the fluids involved in ejaculation and that frequent masturbation appears to flush out carcinogens. Sexual intercourse may not have the same effect because it increases the risk of contracting a sexually transmitted disease, which could raise the risk of cancer, the Web site reported.