It found that men ages 20 to 29 who ejaculated 21 times or more each month were 19 percent less likely to be diagnosed with prostate cancer than those who ejaculated less often, between 4 and 7 times per month.
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