In-between all these reviews, and my complaining of stories falling short of my overly picky expectations here and there, let's give this a break. Here is a treat instead, in the shape of a link to and a recommendation for a short story by Ian McDonald, called Some Strange Desire.
It concerns the machinations of a subspecies, a variant of humanity, two chromosomes apart, living alongside us. They are gender-fluid, able to change quickly and as desired. They work as prostitutes, as they require human haploid cells they acquire during sexual intercourse, to allow their extended life span. But there are threats to them, now, both from within their own making, and from the outside.
And I suspect I've told you too much already, just to whet your appetites. The cultural background Ian wrote for this is part Jewish, part West-African/Haitian Voodoo, and part Witchcraft, and it's utterly fascinating.
The story was originally published in Omni Magazine, and was nominated for a World Fantasy Award. The illustration is by Robert K. J. Killheffer.