Gender
If you identify as anything else than Man or Woman, thebuncoartist deeply apologize for not having more programming skills, than leaving you with Unisex as the last option. Too many ins and outs in thebuncoartist's head.
But to be fair, - it should be okay, shouldn't it?
I don't think anybody would raise an eyebrow, if you mix and match to any standard as you like, and certainly not thebuncoartist!