Answer:
What is black when it's clean and white when it's dirty?
So cold damp and dark I am. To stay you would refrain yet those who occupy me do never complain.
What kind of coat can only be put on when wet?
I hold two people together but touch only one.
I am alive without breath and cold as death. I am never thirsty but always drinking.
A doctor might remove one from the neck of a Dracula victim.