Brainstorming: A Futa story (Patreon)

I've been asked to contribute a futa story to an anthology. I want to use a story from my Succubus Cafe series. It's a series were people inadvertently make a deal with a succubus by making a wish of their deepest desire and she grants them. So far I've done a BDSM and a lesbian series and I have a cuckolding and a futanari in the works. I thought I'd do another futanari one. 

So, what type of woman do you think would wish to become a futa? What set her off on this desire? And once she gained her futa-cock, who does she fuck with it?