The core of improving the realism of sexdoll heads lies in the combination of material science and bionic engineering. The "skin-revitalizing silicone" technology developed by a Japanese laboratory simulates the breathing feeling of human pores through nano-scale pore structure, reducing the difference between the touch of sex doll heads and real skin to 12%. The connection between this material and the torso sex doll adopts a gradient hardness design to ensure a natural transition when the neck moves. A more cutting-edge application is the micro-expression control system - the built-in 32 sets of micro motors can drive eyebrows, lips and other parts to complete 27 basic expressions, and users can preset emotional modes through mobile phone APP. When the torso sex doll is equipped with such an intelligent sex doll head, its interactive realism can be improved by 40%, but attention should be paid to the balance between motor power consumption and heat dissipation design.