Answer:
Man's most important invention.
People in love are often bound to this.
How can a pants pocket be empty and still have something in it?
What goes up when the rain comes down?
In the middle of night, I surround the gong. In the middle of sight, I end the song
I break away from my pack. I create holes in my victims. I can travel for miles and then disappear. I am part of a dying breed. What am I?