Answer:
Men in skirts blow into these.
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
Proof you've done your time in school
What can you keep after giving it to someone?
What is it that leaps and runs and yet, has no feet?
I am a room that has a roof but no walls. What am I?