The production of a standard-sized full-body sex doll requires about 50 kilograms of silicone raw materials, while a thick sex doll consumes more than 80 kilograms due to volume expansion. However, the cost increase is not linearly related to the price increase - data from a leading brand shows that the cost of raw materials for fat-type models has increased by 60%, but the price has only increased by 30%. This seemingly contradictory pricing stems from precise market positioning: users with special body shapes are more willing to pay for exclusive products and rarely compare prices. More importantly, fat sex dolls often adopt a differentiated design strategy: thickened joint bearings bear greater weight and strengthen the internal skeleton support structure. These implicit technology upgrades have become a strong support for price increases. When consumers embrace a full body sex doll, they pay not only the material cost, but also the value recognition of the concept of body tolerance.