"Nishikawaguchi fuzoku, paipan (fully shaved)" — for some people that phrase clicks instantly, and for others it means nothing at all.
I'm 42 and still out there working the floor of this world, so I'm going to lay it out from a real, ground-level point of view.
Why this topic matters
There's surprisingly little good, organized information out there about fuzoku — Japan's licensed adult-entertainment business. Beginners especially tend to hit a wall where they don't even know where to start looking.
What this actually means
In a word: knowing or not knowing changes the quality of the experience.
What you're reading here is the essence of the knowledge I've built up over 20 years.
Last word
If you've got questions on this topic, hit me in the comments or on social. And go check out First Class Ruby while you're at it.