If we were to take the standard sexuality preferences, male, female, either, and apply them to the sexes, and *then* add the gay male categorization, you start to see the magnitude of the problem (I count eighteen identifications, and we aren't even counting intersex at this point):
top male for female
top male for male
top male for either
top female for female
top female for male
top female for either
bottom male for female
bottom male for male
bottom male for either
bottom female for female
bottom female for male
bottom female for either
versatile male for female
versatile male for male
versatile male for either
versatile female for female
versatile female for male
versatile female for either
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