Answer:
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it can neither see nor feel it. What is it?
If you break me, I do not stop working. If you touch me, I may be snared. If you lose me, nothing will matter.
Three little letters, a paradox to some. The worse that it is, the better it becomes.
A mile from end to end, yet as close to as a friend. A precious commodity, freely given. Seen on the dead and on the living. Found on the rich, poor, short and tall, but shared among children most of all.
What flies without wings?
What is always coming but never arrives?