Often wondered about this in general. Going off some of the AW profiles, it seems that there are a few genuine "bitches in heat", but I believe that most do it just for the cash. I suppose they all must like shagging a bit, because if they hated it they probably wouldn't last long at the trade.
I very much doubt any prossie is in "heat" as any point, it is a job. Only very few people in the world a lucky enough to have a job they "enjoy". Even if they did enjoy it at first after a while doing the same thing day in day our becomes boring. I try to change jobs about every three years or I get bored.
They ALL do it for cash it is a job that you can earn a LOT of money doing. They are self employed (Well the good ones don't have pimps anyway) and can control how much they do or do not work.
Do they like shagging a bit, everyone likes shagging a bit. I like eating McDonalds a bit but if I had to do it for a job it would be boring.
Prossies do not have to like or enjoy their job, makes no difference to me what is important is they are professional with regards to the job and their business. Part of being professional is acting as though they do enjoy the job. If they can not convince you they are enjoying your company then they should not be taking money for sexual services.
The best WG's understand this fundamental truth and will think about good customer service, the bad ones won't give a fuck. The one and only problem I can see about UKP is we do not celebrate and support the good prossies enough. We rightly criticise prossies who give bad service and we should hound those out until they quit.
However when a good one comes along, which I agree is rare, then the attitude is often yeah she is a prossie so she should be good, or she should be good at that price, along those lines. Anecdotally I have notices that the bad reviews on this site seem to have a lot more views than the good ones. I don't know why. Perhaps a new topic.