I'm in my mid 50's.
I have gotten to know many ladies in this line of work very well over the years, some I've dated and some I've become close personal friends of. In a few weeks I am heading out of state to attend one friend's daughters graduation party.
Amongst many of the fine ladies I have known over the years what I stated is exactly what they have told me.
Make no misassumptions, I've had my wild and crazy encounters, threesomes and foursomes with multiple providers, planned encounters with a twist, once in a haunted house ride at an amusement park, etc... but one of the nicest compliments some have told me is that they like being with me because I am easy, I'm comfortable to be with, I don't feel like "work" and they enjoy spending time with me.
These ladies are human, and that gets lost a lot in the stark spotlight of places like this, and many actually do enjoy having a pleasant time at work with someone who makes them feel good without trying to recreate the latest weird porn video they just watched involving a camel, a washing machine, a midget, and 50 pounds of high explosives.
That's probably enough of my bona fides for now, as I have said, please feel free to do whatever you want as far as tipping is concerned, I just wanted to point out that it is not necessary and you won't risk offending the vast majority of these ladies by not doing it.
I've been told many times the best tip is a return visit.