Of course “pretty” is in the eye of the beholder, irl I don’t discount the “pretty” women, but watching beautiful models piss for money absolutely turns me off. Now if I saw a “pretty” girl peeing in the woods, that would turn me on, but I would be turned on the same amount with any/all body types if I had the great fortune of watching.
I can’t answer the OP, but being on this site only a few days, it seems women enjoy the fetish as much as men. As to which facets they enjoy more would be difficult to come up with an accurate conclusion.