It's just work and the acting classes are free ... HA! Whatever gets YOU off is good enough, and a little enthusiasm is appreciated.
Most girls see 5 - 8 customers a day, exactly how many times each day do you think "she's into this" .... on the right day with the right girl and customer there are some "good" "enjoyable" synergies, but if you think customer number 40 for the week is going to get her "going" your dreaming in technicolor!!
It's a job, it's a job, it's a job .... they work, YOU ENJOY .... you're not getting played, it's just a job and their job is to have you enjoy the experience and FINISH ... quite simple. Most girls would rather massage you and provide you a HE ...
I think the girls generally are quite amazing, and most gents here are lucky to have the privilege of their company and services.
You need to review your thinking ... after all you were customer #40, you should be happy she tried at all!
Get out there and have fun!