True. There are different aspects of the mind, you have the logical part and the other part including subconcious and unconcious parts (something like that). It's only one logical part of the mind where that's going to matter (ie whether she genuinely desires you or not), the rest of the mind can't tell the difference. Also, you are still filling the basic sexual need in the pyramid of needs (ie better quality than fapping) and getting female touch and attention. So, I think there is allot of processing both mentally and biological that is not going to tell the difference or care about genuine desire, and only a fractional logical component would (in relation to everything else)
For example, when I dealt with the second escort in 2014, the issue at least that bothered me was I was dealing with an absolute stranger in a sketchy type of location and set-up. If I dealt with an ONS I feel it would be the same thing (ie you are dealing with a stranger, you get post-nut clarity and then realize she probably deals with allot of guys and you regret what you did (if you are not used to it)).