I examine them, choosing carefully which one to go for, some I leave to wait for another day, I spot the one I want. I run my thumb across it to check the length, will it be an easy grip or will I have to dig my teeth in? I place it between my lips and flick my tongue across it, testing. I catch the edge of it with my bottom teeth and position by top teeth over it, I have a good grip. I bite down hearing the crunch as my nail is bitten away, I continue biting along my fingertip until I have the nail cut away from my finger. I do not do this because I am anxious, angry or sad, I do it because I find it pleasurable biting through my fingernails.