http://www.newscientist.com/news/news.jsp?id=ns99994861
"Frequent sexual intercourse and masturbation protects men against a common form of cancer, suggests the largest study of the issue to date yet.
The US study, which followed nearly 30,000 men over eight years, showed that those that ejaculated most frequently were significantly less likely to get prostate cancer. The results back the findings of a smaller Australian study revealed by New Scientist in July 2003 that asserted that masturbation was good for men.
In the US study, the group with the highest lifetime average of ejaculation - 21 times per month - were a third less likely to develop the cancer than the reference group, who ejaculated four to seven times a month.
Michael Leitzmann, at the National Cancer Institute in Bethesda, Maryland, and colleagues set out to test a long-held theory that suggested the opposite - that a higher ejaculation rate raises the risk of prostate cancer. "The good news is it is not related to an increased risk," he told New Scientist. In fact, it "may be associated with a lower risk."
"It goes a long way to confirm the findings from our recent case-control study," says Graham Giles, who led the Australian study. He praises the study's large size - including about 1500 cases of prostate cancer.
Furthermore, it was the first to begin by following thousands of healthy men. This rules out some of the biases which might be introduced by asking men diagnosed with prostate cancer to recall their sexual behaviour retrospectively."
Buy stock in companies that make lubricants!
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Tom Beck
my LiveJournal: http://www.livejournal.com/users/tomfodw/
"I always knew I'd see the first man on the Moon. I never thought I'd see the last." - Dr. Jerry Pournelle
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