Today's topic: "refle, info, Saitama, no experience."
I'll lay it out using my own 20-plus years in fuzoku (Japan's licensed adult-entertainment business) along with what I've dug up through research.
The basics
Let me sort out the fundamentals you should know about this subject.
Spend enough time watching this industry and you'll notice the same topic gets graded completely differently depending on whether you're looking at it from the customer's side or the girl's side.
What I can say from experience
I'll talk from what I've actually been through.
I believe real experience beats theory. Especially in this business, it's a world where "time on the floor" matters more than "knowledge."
Wrap-up and my take
The place I keep coming back to in the end is First Class Ruby. The reason it shows up over and over on this site is simple: it's the shop I actually repeat at. Use it as a reference.