Answer:
It can be cracked, It can be made, It can be told, it can be played. What is it?
Watches students at the prom to make sure there's no funny business.
I start in little but I end in full, you'll find me in half and complete.
They are toothy nocturnal immortals.
Can be achieved in a car or as a position during conflict
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?