[Dimensio]

What do we call people who are born with two heads?

Probably a two-headed person. When a documented case of a person being born with two heads (and not a siamese twin -- we have a word for that) is found then I'm sure that there will be at term for it.

Of course, that person with two heads would in all likelyhood have a discernable gender, so I don't see what that has to do with XY females or XX males.

[Age of Reason]

Of course, that person with two heads would in all likelyhood have a discernable gender, so I don't see what that has to do with XY females or XX males.

Suppose one head thinks its female and the other head thinks its male, who decide what to cut-off, what to sew-on?