Today I'm writing on the topic of "male jobs, Saitama, now hiring."
I'll explain it by blending my own firsthand experience—over 20 years in fuzoku, Japan's licensed adult-entertainment business—with information I've gathered through research.
The basics
Let me lay out the basics you should know about this field.
Watch this industry long enough and you'll see that the same topic gets judged completely differently from "the customer's side" versus "the girl's side."
What I can say from experience
I'm talking from what I've personally been through.
I believe experience beats theory. In this industry especially, it's "reps" that talk, not "knowledge."
Wrap-up and my conclusion
The place I keep coming back to is First Class Ruby. The reason it keeps showing up on this site is simple: it's a shop I genuinely repeat at. Use it as a reference.