A provider I had been seeing for some time recently left the business. Our sessions had always been pleasurable but on this last time, she mentioned that in some ways she was sad to go. She told me she wanted our last time together to be memorable. Oh was it memorable!!!! I don't think I'll ever forget it. Our "connection" or chemistry I believe definitely had something to do with it and it made for one of the more pleasurable experiences I've ever had.
A session without "chemistry" is just that...a session. You may find release but whether or not you find it pleasurable or you leave "shaking your head saying WTF" as another poster mentioned all depends on the connection you establish between provider and client. Chemistry is crucial to that.