Hi, Kitty. Your stomach is a precious organ meant to receive smooth and healthy food for upkeeping your beautiful body and mind. You don't have any right to harm such a god-given gift by eating slate pencils that may cause severe diseases in the digestive system of your body. Slate pencils are not meant for eating, you know well. But your mind is so weak that you are not in a position to resist that temptation. Please stop this nasty habit. You can win this unpleasant battle only if you determine to keep yourself away from such an unhealthy temptation. Good luck!