| It's frontal lobe dementia. Textbook. |
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From the Mayo Clinic:
The most common signs of frontotemporal dementia involve extreme changes in behavior and personality. These include: Increasingly inappropriate social behavior Loss of empathy and other interpersonal skills, such as having sensitivity to another's feelings Lack of judgment Loss of inhibition Lack of interest (apathy), which can be mistaken for depression Repetitive compulsive behavior, such as tapping, clapping or smacking lips A decline in personal hygiene Changes in eating habits, usually overeating or developing a preference for sweets and carbohydrates Eating inedible objects Compulsively wanting to put things in the mouth |
| Neurosyphylis is probably what is wrong. |