It's also the case that "familiarity breeds contempt".
And an interesting idea to analyse IMO.The point at which that creeps in implies a recognition that you do not feel the other person has an equal standing; and of course, when you are paying for a service, there
is no such equal standing: the relationship is maintained by relating to the whore/maid/sales assistant in terms of the role they are fulfilling. Familiarity is toxic. It may be that the person in the service-capacity role becomes too familiar, or the person employing them allows it: either way, the situation needs to be corrected or the service-provider dismissed.
I don't mean you can't have a
semblance of familiarity: as much is frequently part of a pleasant exchange (I might chat away to a market trader but it's a game: my job is to watch that I get value for money).
Prossies play on the punter's emotions to be treated as an 'equal' which then easily changes into pussy-whipped-punter, to put it bluntly. Treat your wife as an 'equal' (assuming she is contributing jointly to your shared lifestyle and bank balance): not the hired help ffs.
You see a prossie for variation. That's the whole point. You don't plan to settle down with her do you? For some punters, modest variation is all they require: but if it is flagging, for goodness sake try a different one. No prossie has a monopoly on your potential for enjoyment of sex. The most amazing prossie will be barely a flutter in your memory a few years and a few dozen whores later.