I don't know if it's a good one.. but.. a few years ago when I was 21; I worked as a model for a year or so (I hated it, but.. actually it paid pretty nicely at the time). At a certain point, I disliked anything that had to do with fashion and decided to try out different kinds of modeling jobs. A few of them where photographers who needed models for their artistic portfolio.
At one photoshoot, the photographer wanted me to be naked (stylish though… nothing pornographic). I decided it was okay. The photographer way actually pretty old, like 50+.
After the shoot he called me to him to look at the camera at some pictures he shot. He was sitting in a chair and I was standing. He made a joke about that he saw I was semi-hard and that he liked how comfortable I was with being naked. Then, he quickly took my dick in his mouth (without using his hands) and started sucking me off. I know he was old and sutff, but it kinda felt nice. I was kind-of in a 'a mouth is a mouth'-feeling at the time, so I let him suck me. He eventually sucked me long enough for me to cum in his mouth, which he swallowed. After that, I got dressed and he said "Ok, that's another thing you can put on your resume". I didn't mind actually, because it was a nice easy sexual relief for me.
After I got dressed I said I was gonna leave, but I had to go to the bathroom first. To which he said: "this might be a weird question; but since you let me drink your sperm, would you mind if I drank your piss as well? I really like that". I said: "ehmm, well.". and he said "please? you don't have to do anything, Just close your eyes, pretend you're peeing in a normal toilet". I thought "o well why not" and I did that. He drank everything, and I just left.
yes, true story 
Actually, that was my first experience with piss, and maybe that's the reason I like those things now... Or, it's always been in my mind, I'm not sure..
ga binnenkort die in rotterdam proberen. thnx