I went to a demo about piss play in D/s training, given by a Mistress who uses her nectar in very deliberate and methodical ways with her man. She calls her training philosophy "the quest for unconditional surrender" He is locked in a Lori PA tube 24/7/365 with a release every 3-4 weeks depending on performance. She has trained him to kneel in front of her when she uses the toilet, with his face resting against her thighs, as she pees. When she is finished, she just spreads her thighs slightly, and he licks her clean. Then she dries herself on his hair. This is a standard protocol for him, everytime they are together, even in public restrooms when possible. When they are out in public, she will often piss in his drink, or ask one of her friends to. Every weekend, he is on 'full toilette protocol', which includes consuming every drop that comes out of her the entire weekend, and cleaning her with his mouth after each time. The man said it was very hot for him for the first few times, but the novelty quickly wore off, replaced by the cold reality of his position, particularly in public, when her friends watch him drink their nectar, no questions asked. The Mistress believes his constant consumption reinforces his submissive mindset like nothing else. He agreed that he has now accepted this as an obligatory facet of their relationship, so much so, that he now regularly anticipates her bathroom breaks, and even attempts to influence what she eats and drinks, to avoid pungent or overly-ripe nectar. She said his next step will be training him to remove her soiled tampons and pads, cleaning her, and inserting a fresh one, all with his mouth. The man told her he'd rather eat her feces than do that. At the end of the demo, the Mistress handed out dixie cups to four women in attendance, and asked them to fill them up. The Man had to drink all 4 cups, plus a cup from his Mistress, and then guess which one was hers. If he guessed wrong, he would be required to consume 5 more cups, this time from guys in the audience. Amazingly he guessed correctly, much to the disappointment of the audience. I would love to hear other people's feelings about, and experiences with, piss, golden showers, toilet play, etc. It reminds me a lot of enforced chastity and feminization in terms of its emotional impact and effects on a power exchange.