I can see how it could happen: maybe someone who's isolated and starved of female companionship takes an opportunity to spend some time with an escort, comes away buzzing not only because he had such a good time but because the lady (seemed to) have a good time as well. Maybe he visits her again, they get chatting a bit more and he comes away thinking "she has a thing for me".
Because of the level of isolation, any positive interaction from a member of the opposite sex could seem like they're flirting with you. Ultimately, this can be just as harmful as the lack of interaction as you end up deluding yourself and you will crash and burn in a spectacular manner (and maybe you'll never fully recover from it).
Bear this in mind, you're paying for a service. The service can be utterly spectacular, but that's what it is: a service. If you walked past one of these ladies in the street in a normal setting, I can guarantee you wouldn't come on their radar. That's not me saying they're nasty (far from it). I'd compare it to working in an office: there are people in there I wouldn't hang out with after work, but in the work environment we get on well.
We live always underground
It's going to be so quiet in here tonight
A thousand islands in the sea
It's a shame