In the beginning, I couldn't decide whether Cheth would be a man or a woman. The character of a shapeshifting god - or a 'shape-stealing' god - sprang into my head instantly (while at the gym on the rowing machine, if you're curious), but I wasn't entirely sold on his default gender, if he had one at all.
Then I thought, in the spirit of that Old El Paso taco commercial, "Why not both?"
And everything went cray cray from there.