Sex dolls in use

How do I move the sex doll skeleton to my favorite position? This video simply shows how easy it is to move your silicone doll's body parts in the desired direction. The joints are a bit stiff at the beginning and later because they are supposed to hold the position when the sex doll is in use. They wouldn't hold up if they were too loose. They need to hold the weight of the dolls and a little more when in use.