Be careful when posing before using a sex doll. The limbs of sex dolls have a certain range of motion.
Although today's sex dolls have a vastly increased range of motion, they still don't move as freely as real people do. If you are
swinging a sex doll's arm, you should stop immediately when you move too hard and the arm cannot move, your sex doll is likely to
be damaged. The reason you can't move it is not that you are not strong enough, but that you have not found the skill.
The limbs of the sex doll are made of steel structure with specific sliding trajectories. You can try to find the rails
slowly first. This way, you can easily make the sex doll any shape you want later.