Circumcision not only cuts off your foreskin, it also cuts in half your risk of contracting HIV:
Two major studies released Wednesday confirmed that circumcision can dramatically slow the spread of HIV among African men, suggesting that widely offering the procedure could prevent millions of deaths in countries most seriously affected by AIDS, researchers said.
The studies, in Kenya and Uganda, found that circumcised men are about 50 percent less likely to contract HIV than those who are not, a result that echoed similar research last year from South Africa. In all three studies, the results were so persuasive that researchers stopped their experiments several months early and offered circumcisions to all of the subjects, deeming it unethical to withhold a procedure that might prevent an often-fatal disease.
In related news, recent studies show that Jews are over one thousand times less likely to be killed or injured due to Christmas tree fires. So there.