It's His Piss Party. Can He Piss Where He Wants To?

"He tells the same lame jokes every time he’s pissing on someone."by Dan Savage
I have a sex etiquette question for you. I like watersports, and I’m always looking for situations to practice. Several years ago, I heard a rumor about a guy in a rural area who holds piss parties during the summer in his backyard.
When I found a mailing list for those interested in piss play, it wasn’t long before he posted about one of these parties. People on the list serve talk a big game, but