A pen. We use our pen every time we want to write something. Something crazy, something peaceful and something unusual. In other words our pen is very useful to us, we can use it to hurt somebody physically, and even kill them..
Have you ever ask this to your self? What if pens can think of their own? What do they write? Do you think they will write something bad to their owners? Do they want to refill every time they get out of ink?
Hard to figure out isnt it..?