Answer:
Where jewelry pierces your head.
You can have it, and be at it, But it never lasts forever.
A job that involves sitting in a highchair, wearing a black gown and smacking things with a mallet
What flies forever, rests never?
Passed from father to son and shared between brothers, its importance is unquestioned though it is used more by others.
What never gets any wetter no matter how hard it rains?