Years back I was briefly into creepypastas. One I read was a guy who had a habit of chewing his nails and that people around him always made a big deal about it but he thought they were overreacting. At the end it was revealed that he had long ago chewed away his fingernails and was now chewing through his actual fingers without realizing it. As a result he was institutionalized for his delusions, I think.

This picture makes me think of that. Thanks, I guess.