The truth was, I didn't have a good reason other than a selfish need to see her tightly bound. I started her out easy with the chains giving her some movement. Little by little that eroded away as the chains were tightened and more added. After 5 minutes, Sky was pleading for help with her eyes, her panel gag preventing any verbal appeals. Another chain was added instead. This one connected her head harness to a crotch chain. Now bound tighter than ever she developed a higher respect for the power of chain. Knowledge she'll remember if I ever let her free.