Answer:
I make things short but I am pretty long myself
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes
I am a cold man without a soul. If there is warmth in me, it slowly will kill me. What am I?
I am expelled from you orally with a sound
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I’ve told you all I cannot tell you more.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.