"Omiya fuzoku, flexible shifts" — some people hear that and instantly get it, and some don't.
I'm 42 and still out walking these streets, so I'll put it together from a real, on-the-ground point of view.
Why this topic matters
A surprising amount of fuzoku (Japan's licensed adult-entertainment business) information is poorly organized. Beginners especially tend to end up not even knowing where to start looking.
What it actually comes down to
In a word: whether you know it or not changes the quality of the whole experience.
What I'm writing here is the distilled essence of knowledge I've built up over 20 years.
In closing
If you've got questions about this topic, drop a comment or hit me on social. And while you're at it, check out First Class Ruby too.