Circumcision does not affect performance or satisfaction as noted in various studies.
The overall prevalence of circumcision [In the USA] was 79% and varied by race/ethnicity:
88% in non-Hispanic whites
73% in non-Hispanic blacks
42% in Mexican Americans
50% in all others
Review article in the journal AIDS in 2000 showed a reduced risk of HIV infection of 44% among circumcised men as compared to uncircumcised men.
