I worked with my wife on this for nearly a year so that she would be comfortable enough to try it. I started by asking her to let me touch and play with her pussy when she would pee right after we had sex. I would kiss her slow and deeply as she sat down with her legs spread open and I would slide my fingers up and down the outside of her inner lips and over her hood. Her pussy would still be nice and wet so my fingers would slip easily.. then when she began to pee I would run my fingers between her lips to feel her hot stream of pee spraying over my fingers while i continued to play with her pussy and kiss...
I would ask her to let me do this a couple times a month for almost a year, then I asked her to sit in my lap... so I would sit on the toilet first, then she straddled me... my cock at half staff, and when she peed I could feel her hot fluid spraying down over my shaft which turned me on instantly and my cock throbbed up against her pussy as she kept going.
Then last month I finally got her to get in the shower with me and piss in my mouth... I had planned this out and she knew it so we had been drinking water all day and had some really great sex later that afternoon... then we went to the bathroom and she stood in the tub with one leg on the ledge to open her legs... Very gently, I gently lapped at her pussy with my tongue... then she finally started going.. at first it was a little dribble and I could just feel a warmth covering m tongue... the she started going more and more, harder and I could feel the force of her stream spraying into my mouth as I kneeled in front of her... I opened my mouth and wrapped my lips over her mound and closed my mouth over her pussy again and again while she was peeing... Her hand was on the back of my head and mine were cupped on her ass. The feeling of her hot stream of piss spraying into my mouth, on my lips and tongue, then spilling out and running down my body was sooo incredibly sexy!!!
Once she was done I asked to pee on her clit, to which she obliged. Of course, this took a few minutes, just as it took a few minutes for her to start too... you have to get past all your inhibitions, even if you are already turned on by the idea in general. My stream dribbled at first, but soon become a spray of warmth directly against her pussy. She held her lips apart with her fingers and then kissed me deeply. Of course this was an incredible turn on because I had not rinsed my mouth since she had just finished. (but it was like warm water so nothing "bad" to be concerned with).
She was indifferent about the act itself - giving and/or receiving - but she was turned on just from the fact that she knew, and could tell that it really turned me on, so in that respect, she enjoyed doing it. While she is not ok with the idea of me going in her mouth, she did say that next time, I can all over her body, as far up as her breasts... I Can't Wait!!!