To be honest, I can't really say that is the reason why I punt. I've met some pretty dirty and fun whores, but never really met a prossie that has given me the same amount of services or level of great uninhibited sex that I've had had at the best of times with civvie partners.
I punt because I enjoy it, for the thrill of it, for the choice and variety, and because it's a lot more easy, convenient, and generally more reliable than getting sex from civvie women.
Beyond what I would really consider basic GFE services such as French kissing, RO, OWO and protected sex, other services are actually not all that important to me to have a punt that I am happy with. Convenience, price, location, good coms, a good attitude and looks are more of a priority to me than getting those more hard to get services such as CIM or anal. I enjoy such services, but don't go out of my way or pay over the odds to get them, just not worth the effort for me personally.