More research is needed to determine what’s responsible for the link, but it might be that more frequent clearing of the prostate—through ejaculation—could cut the chances that tumor-triggering infections may develop there, says study author Jennifer R. Rider, Sc.D., M.P.H.
Won’t be having sex 21 times this month? Don’t worry: The study showed a dose-dependent relationship with ejaculation and prostate cancer risk, meaning that the more you do it, the more your risk decreases, she says.
So even ejaculating just a few more times each month can likely bring some benefits to your prostate.
Plus, it doesn’t matter whether you orgasm with your partner or on your own—the advantages of ejaculation are seen regardless of whether you’re having intercourse or just masturbating.
Source: Men’s Health