David sometimes talked to pictures and masturbated in public, which is forgivable when you're schizophrenic. 

He slept in flophouses, churches, cheap hotels and empty underground tunnels where he was considered a "mole person".  He was familiar with body lice, dirty sleeping bags, city tents, cardboard boxes, dumpster diving and dumpsters as shelter; shantytowns, abandoned buildings as top notch sleeping arrangements and public transportation with unlimited…