Answer:
Where humans breath liquid?
People like this usually live in rural areas, unless they are lucky enough to strike oil and move to Beverly Hills.
What tree that definitely grows does not have a shadow and does not grow fruit?
There are two bodies on the floor. They are surrounded by water and broken glass. How did they die?
People are hired to get rid of me. I'm often hiding under your bed. In time I'll always return you see. Bite me and you're surely dead.
You use it between your head and your toes, the more it works the thinner it grows.