Known also as Body Integrity Disorder and Amputee Identity Disorder, Apotemnophilia is a neurological disorder characterized by the overwhelming desire to amputate or damage healthy parts of the body. Though not much is known about this strangely terrifying mental illness, is is believed to be associated with damage to the right parietal lobe of the brain. Because the vast majority of surgeons will not amputate healthy limbs upon request, some sufferers of Apotemnophilia feel forced to amputate on their own — a dangerous scenario. Of those who have had a limb removed by a doctor, most are reportedly happy with their decision even after the fact. This is one of the most interesting mental disorders that mental health professionals are clearly still trying to understand and treat.