I think that they do not really do things out of attraction. It’s for money, right? You just have to be not yucky!
You think they kiss because they’re really horny?
Actually, I would say at holistic spas, looks don't matter much, girls are mostly business and onto next client.
At semi-legits though, your mileage is actually quite dependent on how well you look, e.g. fit, good looking, etc. More physically attractive guys will get more services for less tips, it's a fact.
One semi-legit MPA I saw very recently told me that an old man in his 60s/70s tried to LFK her in the session before me with the promise of $100 tips and she rejected him right away, he got mad and even left before the session ended. She had no problems DFK with me in my session right after even though I only tipped her $60 with nude too, and she was happy. I consider myself as a young and fit guy so it does help in the semi-legit scene quite a bit where ladies are not as much about money as holistic workers.