"Fuzoku, tall girls, Kawagoe"—say it out loud and some people get it instantly, while others don't. (Fuzoku is Japan's licensed adult-entertainment business.)
I'm 42 and still out there working the floor of this world, so I'll lay it out from a real-world point of view.
Why this topic matters
Information about fuzoku is surprisingly disorganized. 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 completely changes the quality of the experience.
What I've written here is the essence of the knowledge I've built up over 20 years.
To wrap up
If you've got questions about this topic, hit me in the comments or on social. And check out First Class Ruby while you're at it.