I've done plenty of kinky things in my time, but they were almost all of my choosing: sounding, A2m, wearing panties, taking risks in public, gay encounters, online exposure, etc.
The only thing I've ever done that wasn't my own choice or preference was my first ever golden shower. I was playing with a dominant woman at the time and we were both getting really excited. She loved to push my boundaries, test my limits, and that is exactly what she did this time. I was bound, my body was covered in humiliating writings, I had been well used except for my untouched erection. she told me she had decided what to do to me next and led me into the shower, she ordered me to lie down on the shower floor and stepped over top of me, telling me what she wanted to do as she did. Any misgivings or hesitations I might have had were long gone by this time, I would have done anything she wanted at the moment in time, and that is exactly what happened. She hit record on her phone, relaxed herself and started. After a few seconds she looked down at me, smiled, and said "Open your mouth!"
I almost came without contact as this sexy woman recorded herself pissing all over my humiliated, well-used body, and then ordered me to let her fill my mouth with her piss.
When she was done, she allowed me to sit up, smiling as her fluids ran out of my mouth and down my body, I leaned towards her and licked her wet pussy until she turned around to get the shower turned on.