It's a statistical statement that is valid against a group and not necessarily against an individual. Kind of like how racial demographics are important when a

It's a statistical statement that is valid against a group and not necessarily against an individual. Kind of like how racial demographics are important when analyzing segments of society, while racial profiling is not fine to apply against the guy that just drove past your parked police cruiser. So, "being exposed to at least one STD virus is virtually inevitable" is a valid but somewhat clumsy way of saying that in general, people will be exposed to STDs. But it's not saying that you, the individual person reading this will inevitably be exposed, and nor is it saying that your individual spouse/partner is probably lying about their sexual history.