Answer:
Even if you throw it away, it still comes back.
People in love are often bound to this.
This is a shape and a symbol that we literally cannot live without. What is it?
The part of the bird, that is not in the sky, Which can swim in the ocean and always stay dry. What is it?
What has one hand longer than the other, and goes on all day and night?
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?