The "sex doll modification case" heard by the German Federal Court in 2024 triggered a redefinition of the legal attributes of the life size sex doll. The defendant purchased a standard body product and replaced it with a flat chested sex doll component through 3D printing, and was accused of "manufacturing child pornography". The court ultimately ruled not guilty on the grounds that the modified product did not meet the legislative definition of "having a clear age orientation". This judgment has spawned a new industry - the annual market size of compliant modification kits has reached 230 million euros, including modular life size sex doll skeleton systems with adjustable busts. However, child protection organizations pointed out that such technology may reduce the psychological inhibition mechanism of crime and urgently need legislation to fill the gap.