Circumcision:

Now it is confirmed scientifically that circumcised people have a very low incidence and prevalence of developing cancer penis. So circumcision has very protective role in the prevention of cancer penis. It was observed that cancer penis was very rare in Muslims and jews because they are circumcised at an early age.
Compelling evidence has shown that newborn circumcision prevents urinary tract infection (UTI) in infancy, balanoposthitis and phimosis in childhood and adolescence, human immunodeficiency virus (HIV) infection, and certain other sexually transmitted diseases (STDs) in young adults and invasive penile cancer (IPC) in middle and old age. (Reference:"Pediatrics-The Highly Protective Effect of Newborn Circumcision Against Invasive Penile Cancer")
According to a study published in NEJM, "Male circumcision is associated with a reduced risk of penile HPV infection and, in the case of men with a history of multiple sexual partners, a reduced risk of cervical cancer in their current female partners"