Neuroscientific research has confirmed that the smell of a corrupted chick sex doll will form a strong negative memory. Functional magnetic resonance imaging showed that when subjects came into contact with uncleaned the torso sex doll, their amygdala and hippocampus were abnormally active. Once this conditioned reflex is established, it may cause generalized anxiety - in one case, the patient vomited when he smelled similar body odor, and even triggered physiological rejection when facing a real partner. Psychotherapists recommend establishing positive olfactory associations, such as using specific fragrances after cleaning to strengthen pleasant memories.