As someone that has a fetish for watching attractive chicks drinking a guy's urine, those scenes were awesome. I haven't so much noticed the decline, though. Maybe, the reason is that I get just as much from that as watching a chick drink a pee cocktail, which GIO has been releasing from time-to-time. Especially, when she had a dry chin (meaning that she most likely drank the urine).
What I'm really looking forward to, is a pee festival. I think GIO has only done about a dozen scenes like that, but I think it has been like a year now. Here's the hottest scene I've ever scene:
https://pornbox.com/application/watch-page/216211Linda doesn't do a lot of scenes like that, but boy did she not leave anything on the table. That was a lot of frEakIn urine. Kaira is another favorite of mine in the genre. She probably done about a dozen wet scenes, including a pee-festival-type scene, too.