Perhaps you can answer a couple of questions I have regarding different conditions regarding mental illness or a syndrome like Tourette's where an individual has uncontrolled motor and vocal tics. For instance, some people with Tourette's have bursts of profanity. I know they have no control over these outbursts but why do they use profanity, why not some other phrase or word that isn't profane? And why do some people with schizophrenia hear voices that tell them to do bad or dangerous things to other people? I knew one man who had schizophrenia but he thought he was the second coming of Christ; he wasn't in any way a danger to others. Ultimately, he committed suicide. What is the ratio of persons afflicted with schizophrenia where auditory hallucinations lead them to self harm rather than externalize their delusions by harming others. I'm not just referring to mass killings since I would think those percentages would be miniscule.