Today I'm writing on "what is a ruined orgasm? A full breakdown of the techniques to pull it off."
I'll mix in my own firsthand experience from 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 fundamentals 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'll talk from what I've actually been through.
I believe firsthand experience beats theory. In this industry especially, it's reps, not knowledge, that do the talking.
Wrap-up and my verdict
The place I keep coming back to 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. Take it as a reference point.