I have actually only done it once. In Cambridge. Story time!!!
Me and a few friends (Sid and 77 Carl) were headed to an Asshole Parade show in some obscure suburb. We got completely fucking lost, and finally arrived two hours after the fact. The show was long over, and we were pretty upset, but just happy enough that we even found the fucking place. Luckily, there was a party going on there now, so we decided to chill, half-defeated, in the driveway. Cracked our four lokos and just observed and giggled.
So, about a lok and a half into it, some girl from the party comes up to us, introduces herself, pleasantries, whatevs. She then states that she has to pee. I managed to eek out a little "You can pee on me...?". NO idea why I did this. It's not even a funny joke, it was just a dumb statement coming from the mouth of a drunk 17 year old. However, she said "yeah, sure, follow me".
We went behind the house, in some long grass. She demanded that I lay down. So, uh, I did. She aggressively pulled up my shirt, pissed all over me. Face, hair, she didn't give a shit. Then she just... left. With a soft spoken thank you, she ran off into the night.
I just kind of stayed in that exact same spot for about 30 minutes, letting what just happened soak in (kekeke). Pondering about what the fuck I was doing with my life.
Good times.