Answer:
I go from house to house a messenger small and tight. Whether it rains or snows I sleep outside at night.
My teeth are sharp my back is straight to cut things up it is my fate.
I am a way to say goodbye to your sweetheart
When you take away the whole from me, there is always some left. What am I?
What can travel all around the world without leaving its corner?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?