I wouldn't say he was boundary pushing by only asking, as long as the answer is accepted. What I don't understand is this part, - "I was just wondering if you said you didn't want HR, B2B etc but were only interested in FS whether it is then actually offered?" - as that is impossible to answer, the OP himself even said services can vary even at the same establishment.
The services provided at massage parlours varies enormously and can go from totally legit where underwear is kept on to full escort services and everything in between.
A place I have been going, for the last few years, with regards the massage, the girl know 100% what she is doing. Happy ending has always been on offer at £20, and no indication of anything else
Would say on my 6th visit, and having a good feel of her ass, she now asks me how much, and this was for her to strip naked. She was happy with £50 so then striped naked, and no objections to finger her.
I suppose it could be down to trust, so at first all you get is a happy ending, but if you become visit more frequently, then she opens up.
So the girl I have seen, i now know, she is willing to strip, but dont know if she willing to have sex. If she willing to have sex, think its going to be at a cost of around £100