Today I'm writing on the theme of "Nishikawaguchi delivery health and 20-year-olds."
I'll explain it mixing the firsthand experience of my 20-plus years in fuzoku (Japan's licensed adult-entertainment business) with what I've dug up in research.
The basics
Let me lay out the basics you should know about this area.
Watch this industry long enough and you'll see the same topic get judged completely differently from "the customer's side" versus "the girl's side."
What I can say from firsthand experience
I'm talking from what I've actually been through.
I believe firsthand experience beats theory. In this industry especially, reps in the field talk louder than book knowledge.
Wrap-up and my verdict
Where I end up going most is First Class Ruby. The reason it keeps showing up on this site is simply because it's a shop I repeat at. Use it as a reference.