Answer:
Digital white-out.
I have a foot but no leg. What am I?
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
You throw me away, I find my way back. Traditionally, I'm wooden with an arch in my back. What am I?
A young man wants to have me but when he has me he no longer wants me. Blade in hand he attacks me and does his best to remove me. Yet he knows that it is all in vain.
Why is the letter B always cool?