gnawing on the edge of the table

Ever since I got sober, I stopped biting my nails.  I'm not sure what to do with them.  Are men allowed to clip their nails?  I'm amazed at how fast dirt amasses underneath.  Now I can start fingerpicking again, you know, the banjo.  I'll have to keep my nails in shape by filing them.   But the sound and texture of the nail-grinder on my nails gives me shivers like when someone folds a paper too vehemently.  It makes me scream like my head's about to burst and my skin's going to rip.