Answer:
The more of this there is the less you see. What is it?
I go from house to house a messenger small and tight. Whether it rains or snows I sleep outside at night.
I have thirteen hearts but no body or soul. What am I?
Drop me and the world will shatter. You can always find me where you empty your bladder. What am I?
I belong to everyone. Sometimes make you happy sometimes make you sad. I will never end until the day you do.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.