Hmm easy, pee in a measuring cup or a container. Take the time on how long time it took to pee. Then measure on a kitchen weight. Use metric values where 1kg is the same as 1 liter for pee ( water). Then you get speed in ml/ sec
I think I know what video you are talking about. Girls filmed at music fetival in Denmark. I also think maybe I have that video. Let me search a bit and send you the link if I find it
If its not to much to ask can you explaine how you look down there. I am trying to figur out if certaine lookes down there producer hissing sound while other lookes dont
Thanks for the answer. So you would say it is more girls with a bit longer inner labia maybe folding innvards that makes the sound. Maybe like a tulip type vulva