[Rodney King]

How do they know how someone contracts aids? If a russian guy gets aids, how do they know how they got it? Do they just ask him? How many times? If I was a fag who had AIDS, I would deny that I got if from gay sex so that my family wouldn't find out that I was gay. I would think that impulse would be even stronger in Russa, where homophobic attitudes are much more prevalent.

[David Hunter]

How do they know how someone contracts aids? If a russian guy gets aids, how do they know how they got it? Do they just ask him?

They can find out if AIDS is spreading heterosexually by comparing the ratio of infected men to infected women. This is what epidemiologists do as a matter of routine. That's how we know that AIDS spreads almost exclusively by heterosexual intercourse in Sub-Saharan Africa. However, if men are becoming infected because they are using female prostitutes who are HIV+ then that doesn't help the ratios.