Using science to prove your argument

Circumcision

Studies on male circumcision have shown that circumcision reduces the risk of HIV infection for the circumcised men.

Male circumcision for the prevention of heterosexually acquired HIV infection: a meta-analysis of randomized trials involving 11 050 men

Systemic review of medical literature found male circumcision is an effective strategy for reducing new male HIV infections, however, its impact at population level requires consistently safe sexual practices to maintain the protective benefit.