Don T., Good question, at least an honest one....I've heard, as you may have too, that the HIV virus was released originally to homosexuals, and in Africa. It would not be hard to assume, that once the virus was out, that it could, and has, spread to, and throughout anywhere bodily fluids, are exchanged..either blood, semen, or otherwise. Since the HIV virus has been out there, most all health care professionals (dentists too), emergency workers, police, and fire, now are required to wear gloves, when required to touch or handle other people, in the execution of their services.
So, it is not confined to primarily the homosexual community, but it is certainly, the largest segment of our society, that is a carrier, outside of Africa...where they are dying by the thousands.
Akenaton, is quite correct, however, in his concerns. Not admitting that, or even resisting that fact, is just denial, and a dangerous denial, as well. Actually, it's good you brought it up.