It's not something I've ever had any particular interest in, since it's just a symbol that's never really clicked in my head. That being said, there are some circumstances where a guy just looks so .. susceptible to being pissed on. The first time I thought of it in that sort of light was when discussing a scene that would end with me having a chain collar padlocked to a hook in a cement floor. He was particularly into watersports, and the idea of being that helpless and violated by being pissed on actually became appealing. Since then I've found a few similar photos that have made me think about it the same way.