They may not be very familiar to the world at large, but they are certainly familiar to the brothers in butt fucking. To say that each gay person belongs to one of these types is a bit deceptive.
It's like saying that every woman is either a Carrie, Charlotte, Miranda, or Samantha. There are plenty that fit the mold for each squarely, but most are really a combination of the types, or like to think of themselves as individuals, even though they still have many of the traits from one of the pre-selected identities. These aren't the stereotypes of the world at large, they are the ones we have invented for ourselves, and they are just as reductive. Each of the groups tend to hang around only with members of the same groups, and they all have their own bars, parties, music, customs, ways of dress, and intricate mating rituals.
