Answer:
I am commonly ate before I'm born and after I'm dead.
What building has the most stories?
I go through a door but never go in, and never come out. What am I?
Who is the most foreign visitor you could imagine?
I have feathers that help me fly; with head and body but I'm not alive. Very skinny and a fixed length how far I go depends on your strength.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.