https://www.health.harvard.edu/mens-health/ejaculation_frequency_and_prostate_cancer
High ejaculation frequency was linked to a decreased risk. Compared to men who reported 47 ejaculations per month across their lifetimes,
men who ejaculated 21 or more times a month enjoyed a 31% lower risk of prostate cancer.
And the results held up to rigorous statistical evaluation even after other lifestyle factors and the frequency of PSA testing were taken into account.
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