First off, gay men are more likely to contract HIV than a non-gay man;
Stinky, a point of clarification, if I may: Gay men are more likely to have HIV than a non-gay man. With today's medicines and drug "cocktails" available, most HIV positive gay men are being successfully treated for the disease. A few short years ago, an HIV positive diagnosis meant an automatic death sentence from AIDS. I lost my first partner (we were together 14 years) to the disease before the current medications became available. The majority of HIV positive gay males who take their medications as prescribed are living long, healthy lives, many of them having now been HIV positive for more than a decade, with the virus virtually undetectable in their bodies. The gay male population has been well enough educated that they know the proper precautions to take to avoid contracting and/or spreading the disease. This isn't to say that all do, but most do.
Heterosexual hispanic and black males, especially from the lower income brackets are currently far more likely to contract it. Due to high levels of illiteracy and low standards of education, these men are at high risk for AIDS because they do not understand the reality of unprotected sex, nor do they have available to them the medical/financial resources so the disease can be properly treated.