Answer:
What three letters change a boy into a man?
I sit high glowing and watch the world go by. Without me everything would seem dull and dangerous. What am I?
Deposit red liquid in me.
I need to be taken from you before you can have me.
I am black within and red without; with four corners round about. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?