If the close contact during sex is a good way to get infected then it makes sense that a group that are largely cut off sexually from the rest of the population

If the close contact during sex is a good way to get infected then it makes sense that a group that are largely cut off sexually from the rest of the population would see it first. I think this information is from the UK where MSM are more likely to be engaged with their sexual health (ie get tested more often) than the population generally