Idea I got thanks to Flogging Mollys Devils Dance Floor

Ok so I want to do a gender bender fic and since people didn't like the fact that I was going to have if so Xander had always been a girl, I'm going to have it around the time that Xander was possesed by the hyena. The idea is that since females are the domanate with hyenas, Xander turns into a girl, Spike is in town and finds a pretty brown haired girl and desides to take her with him out of Sunnydalle, what will he think when his pretty green eyed girl turns out to be a pretty brown eyed boy?

What do you all think, should I try it out or make this a challange?