“Ejaculating at least 21 times a month significantly reduces a man’s risk of prostate cancer,” is the headline on the Mail Online. This is based on research from the US that asked men how often they ejaculated per month and subsequent reporting of prostate cancer.
They found that men who ejaculated 21 times or more a month were less likely to report prostate cancer at follow-up than those ejaculating four to seven times per month.
https://www.nhs.uk/news/cancer/frequent-ejaculation-may-decrease-prostate-cancer-risk/
