- jonb,
Actually, the differences in penile cancer and HPV are very minor. Besides, penile cancer's rare, and there's a vaccine for HPV.
When you control for culture as much as you can, such as (say) U.S. and Britain, circumcision doesn't prevent STDs at all. Instead these population-based studies (which compare prevalence to total population rather than total number tested) typically involve Africa or Southeast Asia, where the majority of circumcised men are Muslims.
Female circumcision has also been statistically linked to lower risk of HIV infection.
When you control for culture as much as you can, such as (say) U.S. and Britain, circumcision doesn't prevent STDs at all. Instead these population-based studies (which compare prevalence to total population rather than total number tested) typically involve Africa or Southeast Asia, where the majority of circumcised men are Muslims.
Female circumcision has also been statistically linked to lower risk of HIV infection.