The psychoanalytic school believes that the popularity of flat chested sex dolls is related to the lack of emotion in modern society. The flat chested design of the life size sex doll creates a perfect psychological distance, and its non-aggressive characteristics reduce the user's moral anxiety index by 37%. Clinical cases show that social phobia patients use exposure therapy with the flat chested sex doll, and their treatment cycle is 28% shorter than traditional methods. This psychological buffering effect has gradually attracted the attention of the mainstream medical community to life size sex dolls.