Question: what is it called when you eat paper
Answer: Pica is a psychological disorder characterized by an appetite for substances that are largely non-nutritive , such as ice ( pagophagia ) ; hair ( trichophagia ) ; paper ( xylophagia ) ; drywall or paint ; metal ( metallophagia ) ; stones ( lithophagia ) or soil ( geophagia ) ; glass ( hyalophagia ) ; or feces ( coprophagia ) ; and chalk .