Watch from 6.06 to the end.
Her friend suggests drinking a bit more beer and when that doesn't work, she tries to produce a flow by pressing on her bladder for her - all to no avail!
https://thisvid.com/videos/desperate...val-pissing15/

Asian girl who's very over full tries for two and a half minutes to get a pee flow going.
The scene is supposed to be in a Doctor's surgery and she's supposed to be giving a pee sample, but I don't think he needs a litre!
https://www.eroprofile.com/m/videos/...e-Pissing-Porn

Girl at a festival squats between cars in public and takes a minute to get going. Once she gets started we can tell she was absolutely bursting.

https://thisvid.com/videos/pissing-in-public33/