KNOWLEDGE is Power
These are resources I have found great value in.
The New Topping Book
D & s's alike should understand both sides of the / .
This is a great book for a solid BDSM foundation.
More Than Two
If your relationships have polyamorous elements, this book is a great guide on how to participate in healthy functional ways.
Anal Training, Dr Even Goldstein
If anal training is in order, Dr. Evan Goldstein will tell you everything you need to know to be safe and successful.
Anal Training Tools
Dr. Evan Goldstein's company offers the best products for anal training, play, care, and safety.
How to Measure for Your Cage
Selecting a cage that fits you properly can be confusing. This site has a great method for getting your proper measurements.