Just as HPV has been linked with cervical cancer and head/throat cancer, STIs are commonly associated with prostate cancer. STIs inflame the prostate, which makes the organ more susceptible to abnormally growing cells. Researchers theorize that by removing the foreskin—which is particularly vulnerable to infection—men are less likely to contract the diseases associated with prostate cancer.
However, the authors of the study were quick to point out that this research does not prove a cause and effect relationship. It just demonstrates a link between circumcision and reduced rates of prostate cancer.
Read more at Time.com