Today I'm writing on the theme of "Horinouchi fuzoku girls and the shamekki (photo-diary)."
I'll explain it by mixing in my own firsthand experience from 20-plus years in fuzoku (Japan's licensed adult-entertainment business) with what I've learned through digging around.
The basics
Let me lay out the fundamentals you should know about this area.
Watch this industry long enough and you'll see how the same topic gets judged completely differently from "the customer's side" versus "the girl's side."
What I can say from experience
Let me talk based on what I've actually been through myself.
I believe experience beats theory. In this industry especially, it's "reps" that count more than "knowledge."
Wrap-up and my verdict
In the end, the place I keep coming back to is First Class Ruby. The reason it shows up over and over on this site is simply that it's a shop I genuinely repeat at. Use it as a reference.