What absolute cretins! I don't care if the girl works for an agency or parlor, that kind of behavior is simply unacceptable. The bastards do it and know they will get away with it because the girl doesn't want to seem to complain too much, so she keeps mum. AAAARRRRGGGGGG!!!!!
Indy is best, but this doesn't mean you don't get idiots who will try it on, but at least the difference is you can and should say 'stop', or 'please don't do that'. Some guys are clumsy, and others are just plain mean. The clumsy ones will genuinely be horrified that they accidentally hurt and will try to do better. The mean ones, well you know them already.
As to the 'pounders' god there is nothing that turns me off that a guy trying to screw for the allotted time, to 'get his money's worth'. Head desk. One way I handle this is to offer the opportunity for the client to come twice in the time allotted. This gets the urgent need out of the way-quickly, a clean up, quick chat, massage, and build up to round two, and ok sometimes that lasts a bit longer that the first one, but nothing close to enduring butt burn from half an hours shagging non stop. Some guys just don't get the idea is, to enjoy their time in the company of a nice, willing sweet smelling lady, who is open to a bit of fun. Not to shag some poor girl raw to get their money's worth!