Because of the fact that it uses MSM (male having sex with male as means of transmission) rather than "homosexual orientation) it is entirely possible that a ma

Because of the fact that it uses MSM (male having sex with male as means of transmission) rather than "homosexual orientation) it is entirely possible that a male in this chart that contracted HIV from prison rape or opportunistic homosexual sex could then upon leaving prison, infect a woman who on the chart would be listed in the heterosexual category. So that is a possible connection to prison, and the high incidence of imprisoned black males specifically. Complete speculation on my part though. I am guessing the reason that the categories are across race and (very roughly) sexual orientation is because those are the groupings you would have to address prevention and treatment programs by for the most effectiveness. As a class poor people may get HIV more than the rich, but a program for homosexuals is not going to be the same as for heterosexuals, and there are probably social reasons why there would be different programs for blacks and whites. But again, just speculation.