Answer:
What is an acceptable act of violence during saint Patrick's day?
It covers you, you lose it every day and you'd die without it.
Longer than a decade and shorter than a milennium
I can be found in seconds, minutes and centuries, but not in days, years or decades.
If you are to keep it, you must first give it to me. What is it?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?