Ahhh, but that's due to a lack of understanding of the studies, which weren't "let's start with people who are circumcised and compare their behavior vs. those

Ahhh, but that's due to a lack of understanding of the studies, which weren't "let's start with people who are circumcised and compare their behavior vs. those who aren't". It was, "We're going to take a chunk of individuals in Africa who engage in risky sex, and circumcise half of them, and then track how many of them end up with HIV after a few years"