"Omiya health, credit card" — some people hear that and instantly get it, and some don't.
I'm 42 and still out walking the floor of this world, so I'll pull it together from a real, on-the-ground view.
Why this topic matters
Information about fuzoku (Japan's licensed adult-entertainment business) is surprisingly poorly organized. Beginners especially tend to end up not even knowing where to start looking.
What that actually means
In a word: knowing versus not knowing changes the quality of the experience.
What I've written here is the essence of the knowledge I've built up over 20 years.
In closing
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.