Please talk about both relationships and one-time deals. Your posts might help people to find someone for this. I'll talk about me below as an example.

I've been dreaming for years to have a woman pee in my mouth, I had this fantasy since childhood.

Unfortunately, I wasn't able to do it yet in a relationship, but looking forward to do it with my fresh wife, see my other post.

However, I had the chance to drink from quite a few women in other non-relationship circumstances.

• First times I paid mistresses that had this in their portfolio.
• A few times I did it with women I just met in a bar where a BDSM event was taking place. The nature of the event increased my chances of succeeding. One time a woman agreed to pee directly into my mouth in the rest room. Another time, a woman accepted to pee in a glass and handed it to me.
• A few times I convinced masseuses to pee in a glass for me by telling them that I am doing urinotherapy.
• Another time, a woman I've been dating a few times, but nothing serious, agreed to let me lick her clean immediately after peeing.

Anyway, I think nothing compares with doing it with your SO. Not only it involves love, but you get stability (doing it more often) and lower health and other risks.