So, basically vines are an amateur outdoor peeing goldmine. Just watch any vine including girl(s) peeing and click on "similar vines", there are so many girls recording each other peeing!
Basically, browse through this:
https://vine.co/v/htrWWzQLL5d/similar
Only disadvantage is that the nature of vines makes it so you often only get a couple of seconds of action, but in return there's a lot of them
Here are some of my favourites(I'm a sucker for visible streams):
blob:https%3A//vine.co/a590a77c-81c1-4f01-b05c-add15f2f519e
blob:https%3A//vine.co/e76de1c2-75ee-47a9-ab2c-66a3211c04a0
blob:https%3A//vine.co/7342fbff-f000-47cf-afd8-eae8a823680d
blob:https%3A//vine.co/e171096d-da73-4f32-8447-e8b9ac1115b2
blob:https%3A//vine.co/75bbef71-f10c-4d2e-b2a2-52adbe8cab9d
blob:https%3A//vine.co/1e58c958-e855-44d9-a5d4-c5a07bff40dc
blob:https%3A//vine.co/0e4106b4-7bbd-44f4-8dba-218c1c80ae9d
Look through, maybe follow other "similar vines" links and share your favourites!
EDIT: Okay, I fucked up formatting the links, basically these are the links that lead you to an inbuilt web-player with audio, while a link such as
https://vine.co/v/htrWWzQLL5d will lead you to vine.com and loop the vine without audio. Not sure which one would be prefered here?
EDIT 2: Oh, and how could I forget my very favourite, decent stream, frontal view, outdoors, cute girl with swedish(?) accent: blob:https%3A//vine.co/d2b9c1aa-464a-4dcc-a7ed-a85699a8c608