Studies have come to conflicting conclusions about whether high levels of testosterone increase the risk of developing prostate cancer. A sampling of studies that have helped drive the controversy follows. Cancer Epidemiology, Biomarkers, and Prevention ; Journal of Clinical Oncology ; British Journal of Cancer ; Urology ; Morgentaler A. European Urology ; Slater S, Oliver RT. Drugs and Aging ; My preference is to start men on testosterone, for a couple of reasons. HCG can have sex whenever he wants.