Fat sex dolls appear with their confident and calm image, becoming a positive source of psychological suggestion. When individuals interact with fat sex dolls, they will unconsciously associate the full body sex doll's characteristics with themselves. For example, by observing the round body curves of the fat sex doll, thinking about the health and vitality it represents, and then reflecting on the beauty of their own bodies. In this process, the multiple body concepts created by full body sex dolls allow individuals to understand that body shape is only a part of the self and should not be the only criterion for defining self-worth, helping them to gradually reshape a comprehensive and objective self-cognition.