This is a case where a woman appears more naked because of bondage. She is not posing or performing. Her limbs are locked in position by the steel stocks fastened on them. She isn't posing because she can't pose. The relaxed position of her hands and feet demonstrate that she's aware of this. She must lie in this position, or on her side or on her back but no matter how she lies, she will be exposed. Now that's naked. And it LOOKS naked.

The model in question may be an experienced bondage model or a bondage fetishist who is perfectly comfortable in this pose, and her relaxed hands and feet indicate that she is comfortable. But her psychological state has little to do with her evident vulnerability.