"Omiya fuzoku, slender" — some people hear that and immediately get it, others don't.
I'm 42 and still out in the field of this world, so I'll lay it out from a real-world point of view.
Why this topic matters
There's surprisingly little organized information out there about fuzoku (Japan's licensed adult-entertainment business). Beginners especially tend to end up not even knowing where to start looking.
What this actually means
In a word: whether you know it or not changes the quality of the experience.
What I've written here is the essence of the knowledge I've built up over 20 years.
Last word
If you've got questions about this topic, drop a comment or hit me on social. And check out First Class Ruby while you're at it.