"How the Horinouchi soapland system works" — some people hear that and instantly get it, others don't.
At 42 I'm still out walking the floor of this world, so I'll sum it up from a real-world vantage point.
Why this topic matters
There's surprisingly little well-organized information out there about fuzoku. Beginners especially tend to end up not even knowing where to start looking.
What this means in concrete terms
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. Give First Class Ruby a look while you're at it.