I've never experienced this yet.
I agree with a couple of others, as long as it happened during the session itself, blurted out in the heat of the moment, dirty talk I think it can be good fun. Porn has a big part to play in name calling during sex, and most likely a few dirty words in the bedroom can get a guy over the edge.

 However, once the clothes are back on, I'd find it a bad taste of character, and would probably make me question his respect for women (in general, not just us 'workingfolk').

Depends on the context. 99% of clients are saying it because it turns them on, (too much porno) and I am too, guilty of this! I love it! But then I am more of the filthy kind than the sensual. The term "making love" makes me want to hurl, even when I am in a loving relationship.

I've only had one client that freaked me out say stuff like that because his tone changed. You could tell he was saying these things because he had a twisted hatred towards working girls and he really meant these things in a sinister way. He scared the shit out of me, first time I was on tour too!

But anyway, if it's not something you like, just bring it up at the beginning of the booking whilst discussing each other's boundaries, that way the client knows where he stands and doesn't run the risk of offending you and you then also enjoy your time with him  xox