There have been recent reports saying that masturbating frequently may lower the risk of developing prostate cancer. For example, here: http://www.efluxmedia.com/news_Masturbation_Reduces_Mens_Chance_to_Develop_Prostate_Cancer_16782.html
For the study, the researchers questioned over 1,000 men who had developed prostate cancer and 1,250 who had not about their sexual habits. They found that men who had ejaculated the most between the ages of 20 and 50 were the least likely to develop prostate cancer.
More than that, the researchers also have an explanation for their findings. Apparently, ejaculating may prevent carcinogens accumulating in the prostate gland. The prostate provides a fluid into semen during ejaculation that activates sperm and prevents them sticking together.”
However, U.S. News & World Report has questioned the recent reporting of the research, here: http://www.usnews.com/blogs/thinking-harder/2008/4/23/reporting-on-masturbation-cancer-link-is-wrong.html
Recent reporting you may have read on the health effects of masturbation is wrong. I don’t mean morally; I mean journalistically. PlanetOut reported on Monday that ‘BBC News reported on Wednesday’ that masturbating frequently may reduce a man’s risk of prostate cancer. Masturbating may or may not affect one’s cancer risk, but the only BBC report I can find on the subject is dated July 16, 2003â€”and it contains statistics that are identical to those cited by PlanetOut. (For what it’s worth, that day was indeed a Wednesday, according to this online tool.)”
However, if that doesn’t pan out, there has apparently been research done showing that masturbating while looking at porn can improve the sperm count in the ejaculate: http://loveandhealth.ifriends.net/Article.cfm?Topic=7&SubTopic=11&Article=132
A group of scientists at the Tottori University School of Medicine in Yonago Japan have recently compared semen produced through two different forms of masturbation in the same men. They examined the semen that resulted from simple masturbation and masturbation enhanced by, what they called, “sexually stimulating videotaped visual images” or “VIM.” The study was based on the hypothesis that the better quality ejaculation obtained in intercourse was the result of the increased sexual stimulation and the greater sexual satisfaction experienced during intercourse. They figured that if you could increase the level of stimulation and the sexual satisfaction a man felt during masturbation, the differences between masturbation and intercourse might disappear.”