During several of my teen years, I compulsively ate paper. Even after I stopped, for many years afterward I continued to feel the urge.
I’ve never found a satisfactory explanation for why I did this. I’ve spoken with several mental-health professionals and read extensively about it. Pica (the eating of nonfood items) is considered a mental disorder in itself, but it may be connected to both autism and OCD. I think I had sensory fixations having to do with my mouth—I was late to give up thumb-sucking, and even today I’ve often had the sense that my desire to eat isn’t just about satiating hunger, but about the feeling of food in my mouth. As for OCD, what I can’t get past is that it didn’t seem prompted by intrusive thoughts. I just felt an urge to eat paper, so I did. It’s definitely one of the weirder, more inexplicable behaviors I’ve engaged in during my life, and whatever was motivating it was deeply buried in the recesses of my mind.