This article implies that "when you’re meeting a guy for casual sex, the pool of people you have to choose from is smaller" and this is something which "allows HIV and other STIs to spread quickly among [the gay and bi community]". Is there any truth to this claim, especially from a more rigorous ecological viewpoint with a mathematical backing? Will, all else equal, a smaller more connected community (as opposed to the larger heterosexual community, which is less connected presumably because the pool to choose mates from is much larger) have higher rates of transmission of infectious diseases, and can this be shown to be true? With all else equal I mean same number of sexual partners, same initial disease prevalence etc., so the community's size and connectedness can be shown to be causal factors in accelerating the rate of disease transmission.
We’re more closely connected than you might think.
The reality is that there are fewer gay and bi guys than there are straight men and women. So when you’re meeting a guy for casual sex, the pool of people you have to choose from is smaller. This makes gay and bi guys much more closely connected, sexually, than the rest of the population. It also allows HIV and other STIs to spread quickly among us.