Restraint begins with the release plan
The essential preparation that comes before knots, cuffs or giving up movement.

Protect the body
Never place restraint around the neck. Avoid joints and positions that compromise breathing or balance. Check warmth, color, sensation and movement in hands and feet frequently. Tingling, numbness, unusual coldness or color change means release immediately.
Keep release within reach
Use equipment designed for the purpose, learn from qualified instruction and keep the appropriate quick-release tool immediately available. Never leave a restrained person alone, even briefly.
Try this: Start with a symbolic scene: the receiving partner keeps full movement while practicing signals, pacing and the emotional feeling of being guided.