Although I agree with 90% of what you said, this stuff about the guys strokg their egos by bragging about providers need not be compensated for spending time with them is downright silly. I am not bragging about how much of a stud I am and if you ask any provider that I have been with I am sure she will tell you that I am far from a STUD. Unless you have liquid nitrogen running through your veins or are just too cool to actually become friends with the Lowley John patrons, it is impossible to be intimate with the same people as often as some of us are and not even develop even the slightest friendship.
One thing about me that I will devulge here that I never have to anyone. I usually hobby in the late morning around 10 AM. When my 60 or 90 minute appointment is winding down and we are getting dressed I ask the provider if she has eaten. I know exactly if she had breakfast or not by her breath. Yes, a stomach full of acids with no food in it is easy to recognize no matter how much mouthwash or brushing. If she gets defensive and replies with "Why do you ask" I usually say nevermind and roll on out. If she says that she has not eaten I usually give her some $20s for lunch and roll out. If I did take her to lunch it was because she invited herself.
You make it seem that it is wrong to even suggest something OTC. Maybe it is, but ultimately it is up to the individual provider to decide and there is no set protocol.