Semen therapy

From Health benefits of eating semen:

Semen Therapy is the practice of swallowing the ejaculation of a healthy man, three times a week or more, for the health benefits.

Semen is a natural source of proteins, vitamins, minerals and human specific components (TGFbeta etc.). Health building elements: Selenium, Glycoproteins, Testosterone, Blood-Group Antigens, Spermidine (a catalytic enzyme), Fructose, Zinc, Vitamins B12 and C.

The donor must be healthy: The man must not have STDs (Sexually transmitted disease) or a blood borne contagious disease. He must not have had acute long term exposure to poisons, heavy metals, radiation or intravenous injections.

The receiver must not be allergic to semen, sensitive to testosterone or have cancer tumors that could contact concentrated ejaculate (due to prostaglandins).
Swallowing semen three times a week or more does help prevent and fight cancer. source

Studie show that semen exposure reduces the risk of breast cancer "not less than 50%" source

University of Pennsylvania School of Medicine Department of Research Medicine source

Journal of Clinical Epidemiology source

Also semen content Selenium and Glycoproteins fight cancer
1. source