Answer:
Man walks over, and man swims under. In times of war, it can be burned asunder. What is it?
A beacon from home to guide your way. It can be a lifesaver on a stormy day. What is it?
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.
What contains zero calories, but if you consume it, you will probably gain weight?
What can be swallowed, But can also swallow you?
A doctor might remove one from the neck of a Dracula victim.