The chances of a heterosexual person contracting HIV from random unprotected vaginal sex with non-IV drug using heterosexual in the United States is 1 in 5 million. That means heteros are less likely to contract HIV from having random, unprotected sex than they are to be struck by lighting. As long as heterosexuals stay away from anal sex and intravenous drugs, the odds of contracting AIDs from unprotected vaginal sex are virtually insignificant. The only reason AIDs is so high among heterosexuals in Africa is because they traditionally practice anal sex for birth control and have higher rates of herpes due to sex workers, which dramatically increases chances of transmitting the HIV virus. HIV is an anal sex disease. So in some sense, I guess it is true that it is a gay disease simply because gay guys are considerably more likely to practice anal sex.