James is my real name ---------- a very common name that I probably share with a million other guys in the world, my point is that if the girl tells me her real name is Carly how does that "expose" her true identity. ???????
First names? Not a big deal, obviously. Prob no reason except that some prossies like to pretend that services are provided by an alter-ego (a split personality). And that makes it clear in conversations "which one" you are talking to. When I am talking about services/bookings/etc with my regular, I use her AW name. If we are talking about non-punting topics I use her real name. If I overlap, I get a mild ticking off ;-)
Last names? Wellllll, there you have the key to open the rest of their private lives if you are a vengeful punter or homicidal maniac or just somebody with few social graces.
Sucking dick is surely personal for the punter but I guess just another integral part of a prossies' job. Revealing her full name surely isn't.
I'm not defending the grrlz, I've just spent a bit of time pondering how they think and value things... helps me get better VFM if I don't constantly trip of obscure bits of etiquette.
For the record, I always use my real name in a punt... too many other things to think about ;-)