Initial users often define full body sex dolls as functional tools, but in the long-term relationship, some people will have subtle emotional projections. The behavior of buying clothes for the full body sex doll and regularly cleaning and caring for it gradually gives it a symbolic personality. The fat sex doll has more advantages in this regard – a female user said frankly: “When I hug her soft belly, it’s like hugging the part of myself that has been deliberately dieted and starved.” This mirror effect makes toys a medium for psychotherapy. Users indirectly deal with their own physical anxiety or social phobia by playing with the doll’s body.