I doubt I could find it now, but I remember some video where a young woman is using a small vibrator and her pussy just starts oozing clear liquid and it squirts and so forth until there is a large puddle on the wooden floor around her. You wouldn't think she could hold that much fluid in her ducts or whatever.
It's either piss, or water shot up there with this turkey baster type contraption, when its like that. Most squirter stuff out there is fake, but not to say all of it is. I've seen vids where they show how its done.