well my experience does not extend beyond watching the diary of a callgirl, but i think that

(indicating that they hold some power in the transaction)

is romanticizing it little bit. power in any transaction belongs to person paying. the difference is you pick one of them on her street corner and the other one in the hotel lobby, but i don’t see that fact as any mysterious revelation. and i don’t think that callgirl being constantly late would get lot of repeated business.