Programmable responses train interpersonal skills. Socially anxious individuals use the fat sex doll's AI system to simulate social situations: from the doll's pleasurable thrill when the fat folds are touched, to the cold response triggered by incorrect movements. A Tokyo Behavioral Research Institute has demonstrated that 40 hours of training can reduce real-life social avoidance by 58%. The traditional full body sex doll offers a single level of feedback, while the plump version's multi-layered responses (body temperature fluctuations, muscle contractions, and voice inflections) create a more realistic interactive laboratory.