"Can you earn well at a soapland in Koshigaya?" — some people hear that phrase and it clicks, others draw a blank.
I'm 42 and still out walking 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 poorly organized. Beginners in particular often don't even know 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 over 20 years.
To close
If you've got questions on this topic, drop them in the comments or on social. And give First Class Ruby a look while you're at it.