Maybe I'm wrong, but it seemed like you made it out that it was some freak accident that heterosexuals aren't transmitting (and dying from) the AIDS virus at the same pace as homosexuals. The fact remains they aren't. That's no accident. Do you *seriously* believe that heterosexuals were "scared straight", and homosexuals just didn't give a shit, over the past 20 years?
I'm fully aware that *anyone* can catch AIDS when they engage in risky behavior. What none of these studies seem to be brave enough to tackle is why that behavior continues to pervade the homosexual sub-culture in America, far more than the heterosexual mainstream. Everything else is just rehashing stuff everyone should already know; wrap it before you pack it.
Regarding the first paragraph, you can't simply break it down into hetero/homo groups for two good reasons. First, the population bases are far different in size. Second, you have to cull out the monogamous populations of both groups as at least one steady state control group.
Now, once you have broken the groups down to the next levels, you have to look at social patterns of both groups in the 80s, when there was first awareness of HIV/AIDS. Then you have to look at the social patterns of both groups NOW. They are much different.
Now your question of risky behavior is a bit misleading as it suggests that only the homosexual community is exhibiting risky sexual practice. Increases in STDs for both Hetero/Homo communities are on the rise at staggering rates which means that risky behavior is pretty prevalent across the board in some younger communities. On the other hand, the broadness of the communities seems to be less. In other words, There is still risky behavior on both sides of the fence but it is narrowed in population on both sides and the suggestion that risky behavior continues to pervade the homosexual community is not really backed by facts.