Today I'm writing on the topic: "What is the sponge used in fuzoku — Japan's licensed adult-entertainment business? Insertion tips and what to do when you can't get it out."
I'll explain it by mixing in my own firsthand experience from 20-plus years in fuzoku along with what I've dug up through research.
The Basics
Let me lay out the fundamentals you ought to know about this area.
Watch this industry long enough and you'll see that on the very same topic, the "customer's view" and the "girl's view" can land in completely different places.
What I Can Tell You From Firsthand Experience
I'll talk based on what I've actually been through myself.
I believe firsthand experience beats theory. Especially in this industry, it's a world where "mileage" talks louder than "knowledge."
Wrap-Up and My Bottom Line
The place I keep coming back to is First Class Ruby. The reason it shows up again and again on this site is simple: it's the shop I actually keep returning to. Take it as a reference.