Doctor-Patient really doesn't apply, since very few doctors are paid directly by their patients. Their "customers" are basically insurance companies, not patients.
Lawyer-Client is an interesting one, but I would make the case that the very nature of this relationship is such that it doesn't really meet the requirements of a normal business transaction. For one thing, most lawyers today operate in a legal system that is little more than a government racket driven by lawyers themselves. In addition, most people who hire lawyers are willing to drive themselves into bankruptcy if their legal problem is serious.
Artist-Fan is certainly worthy of consideration, but I'd have to consider some specific examples to see if there is any merit to this. Most famous artists were damn near broke and never made much money on their work while they were alive.
Lawyer-Client is an interesting one, but I would make the case that the very nature of this relationship is such that it doesn't really meet the requirements of a normal business transaction. For one thing, most lawyers today operate in a legal system that is little more than a government racket driven by lawyers themselves. In addition, most people who hire lawyers are willing to drive themselves into bankruptcy if their legal problem is serious.
.....Weaseling....
Artist-Fan is certainly worthy of consideration, but I'd have to consider some specific examples to see if there is any merit to this. Most famous artists were damn near broke and never made much money on their work while they were alive.
....Think modern artists like Warhol.