One important distinction here: while everything you’re saying about MSM is important and true, it only applies to places like the US and Europe, where insular gay male communities initially provided the perfect “breeding ground” for HIV. Once the virus became established in close communities, it became hard to eliminate. In other parts of the world, like southern Africa, where HIV prevalence is phenomenal and scary (with rates as high as 1 out of 5 adults being positive in some regions), MSM does not represent a large percentage of infections. HIV is almost entirely spread by opposite-sex contact.