[Health] Masturbation May Prevent Prostate Cancer

Apparently not
[rquoter]Sexual intercourse may not have the same effect because of the higher risk of contracting a sexually transmitted disease, which could in turn raise the risk of cancer. "Had we been able to remove ejaculations associated with sexual intercourse, there should have been an even stronger protective effect of ejaculations," Graham Giles of the Cancer Council Victoria, who led the researchers, said in the article.
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I just felt a Great Disturbance in the Force...