Ever since i was little i've been a compulsive fingernail biter. I bite them when i do not even realise it and even when im falling asleep. I know it is a dirty habit but germs do not bother me much. They just bleed and bleed but i keep biting, then are the shortest fingernails you would have ever seen i guarentee it. At the moment for example my pinky fingernail is no longer then 2 mm long!