It's just not something that everyone will talk about. But there apparently is a large part of the male gay community that knows that they can get "no strings attached sex" in public restrooms be they on university campuses, airports, malls, rest stops, etc.
You can go into public restrooms all over and see the "advertising."
And from folks that I have recently spoken with, this is also something that "straight" guys will do. It's anonymous, they ain't got to play any games or buy anyone dinner, and they don't have to call anyone.
Just no holes barred, noncommittal, no strings attached sex. I guess this is why you can find this behavior on just about any college campus. At that age, they don't care who they are getting their jollies with. They ae just trying to get them.
And non-college age folks in these communities know this too.
It's an entirely different subculture. And based upon what I've been told, I got to figure that every gay guy at some point has probably delved in some form of quickie sex like this.
Unfortunately, this is the world we live in.