Urologic Oncology: Seminars and Original Investigations publishes article that discusses relationship between ejaculation and prostate cancer.
Nathan P. Papa et al, "Ejaculatory frequency and the risk of aggressive prostate cancer: Findings from a case-control study," Urologic Oncology: Seminars and Original Investigations 35, no. 8 (August 2017): 530.e7–530.e13
We investigated if ejaculatory frequency is associated with advanced prostate cancer.
Higher frequency in a man’s 30s is protective for advanced prostate cancer.
This association was present only for men with new sexual partners after age 30.