In foreign countries like many permiscous African nations the problem has spread to heterosexuals. This is likely due to largely to the high incidence of permiscuous conduct also among heterosexuals.
You make it sound like the 'problem' of AIDS in Africa had spread from a homosexual population to the heterosexual population, due to the promiscuity of hetero's within African nations. Is this your understanding or were you unclear?
Of course this still ignores the fact that whether we are monogamous or not does not erase the chance for contracting a sexually transmitted disease. (IE. AIDS was most likely contracted from eating an infected primate.) Perhaps we should follow the logical order and enforce our religious views onto the animal kingdom as well. Those damn promiscuous apes keep infecting our meat!