Those were the keywords in an ad I saw in the Dom/Fetish section on BP.  The lady was quite attractive and in doing some research, I found that she also had escort ads so it sounded promising to someone looking for "Sensual Domination" (i.e., Domination with actual sex acts).

I bet a lot of people would think I'm nuts to pay a gal to piss in my mouth.

from men who call themselves pathetic losers in an attempt to get some attention. Women who advertise like this are simply trying to cater to a specific niche and they probably get quite a bit of interest.

I think the judging is my whole point though I could be missing something.  

Very good points. I've actually thought about contacting this provider because of her other escort ads. Maybe she's just catering to what she thinks a lot of guys want. I just can't relate to it, if that is the case.

This is a world of fantasy: From age play (subs who want to be diapered and breast or bottle fed) to those whose play revolves around specific and complex scenes and roles. Some want to be slaves, others cucolds,others "forced" into bi service.  Most of us are familiar with OWK which survived for year and was located In the Chech Republic, where slaves could sign up for a week or more of utter slavery, forced to sleep on the floor of cold cells with a thin blanket, punished with real pain.  There were some men who were caned until bloody as punishment for imagined transgressions.  
One of my favorite providers for years had clients who paid a lot of money to be subjected to absolutely disgusting treatment that I leave to your imagination.  After she moved she would return to Philly and I met her for lunch one day. I saw her for a social lunch one day and she asked me to meet in her hotel room.  I got there and she wanted to show me something. She opened a closet and there was a blind folded hog tied gagged "slave"  She showed him off to me as she told me what a "piece of shit he" is and how she was going to leave him like that "for days maybe". We then went out to lunch.
I used to see a sub in Arizona who also liked to be chained and blind folded (but no gag) in a closet while I went outwit a female domme she would see regularly. We would go out for an hour or two and then come back to play with her.  By which time she had climaxed at least two or three times by being left there.  
The one thing that was always important when ever I played as a dom was the after care filled with tenderness and affection from me toward the sub which was important to both of us in being clear where the fantasy ended and the mutual affection and respect was reaffirmed.  
I am not surprised that there are subs who want to be told they are "losers" and probably need to be punished for their failings. I would guess that is cleared u0 at the end of the session, but maybe not in their fantasies.

What I'd like her to convey is a sense of power over me by having me crave her pee, and in addition that she find this sense of power sexually gratifying.  And yes, this is a rather complicated psycho-sexual fantasy, but those tend to be the best.

I wonder if the guy hog tied in the closet was a trainee for some government espionage outfit and this was a part of his training?

by saying that I actually do care what the provider thinks.  That would be that I care that she thinks that I behave as a model client in terms of decorum and fairness, and is inclined not only to see me again, but looks forward to the opportunity, and therefore treats me as a valuable client.

That could just be the market that she caters to. Perhaps giving humiliation and/or degradation are specialties of hers. If so, it would actually make including that line a clever move since it would push away potential clients who aren't into it and attract those who are.  
As a sub, I've enjoyed getting called much worse than a "pathetic loser". To each their own kink.

My comment did seem to put and end to the discussion.
I wanted to make two points in relating what I did --all based on my personal knowledge and experience (tho some is second hand as I have my limits.) (1)This is a fantasy World and the fantasy has not limits as long as the power exchange is by free and understood consent and some of the things even those I find ridiculous or disgusting I do not look down upon as long as the consent is there and 2) For me the after care of the session is very important which is a reaffirmation of the affection and respect the dom has and exhibits for the sub which signals and end of the fantasy moment and re-establishment of the one on one relationship.