Phenomenological analysis reveals the essential characteristics of users' relationships with "flat chested sex dolls." Examining daily interactions with life size sex dolls through a reductionist approach reveals that their emotional value stems from the attribution of subjective consciousness. When describing their relationship with a flat chested sex doll, a long-term user often emphasized the mirroring of their own emotions. The "blank canvas" nature of these life size sex dolls perfectly meets the modern need for a nonjudgmental emotional space. However, phenomenologists point out that the question of whether flat chested sex dolls can serve as soulmates actually concerns an individual's unique understanding of the meaning of existence.