So let me get this straight (so to speak).

Do they all start off as lesbians, and turn into guys so they can continue to be lesbians.

Or were they straight as females and turned into guys so they could become gays to guys?

But would the gay guys be interested - it would be a new take on the Olympic coxless four.

But if it is lesbians they want and they have lost a pair of tits that would count them out of the lesbian market, who are, themselves, interested in tits.

If they wish to target straight girls, then the absence of a cock counts them out of that too.

Like I say this thread and the other one about ladyboys raises conundrums, though this one raises even more.