Modern sex dolls are completely customizable. Owners can choose every detail, from hair color and eye shape to body proportions and even tattoos. This level of personalization allows buyers to create a unique partner that reflects their personal fantasies, preferences, or ideals. For many, the design process itself forms a part of the emotional bond.

Some owners create dolls that resemble their lost partners, while others design dolls that reflect fictional characters or creative visions. In this sense, a sex doll in a sex doll storage case can become a profound extension of one's identity.