In the answer by @Jan to the question What is "stagnation in the prostate"? it is pointed out via Rider, et al. (2016) what is sometimes referred to as the prostate stagnation hypothesis. Apparently, one biological mechanism involves prostatic accumulation of "potentially carcinogenic" secretions, which may create more opportunity for prostate cancer development.
Further research using Google Scholar and Google points out that the prostate secretes fluid that nourishes and protects sperm, but nothing seems to enlighten me as to what excretions (or part thereof) are potentially carcinogenic. So, what are they?
Are they carcinogens responsible for cancer of the cervix or womb?
Rider, J. R., Wilson, K. M., Sinnott, J. A., Kelly, R. S., Mucci, L. A., & Giovannucci, E. L. (2016). Ejaculation frequency and risk of prostate cancer: updated results with an additional decade of follow-up. European urology, 70(6), 974-982. https://doi.org/10.1016/j.eururo.2016.03.027