Answer:
You use a knife to slice my head. And weep beside me when I am dead.
What can you throw but not catch?
There is an ancient invention. Still used in some parts of the world today. That allows people to see through walls.
A seed am I, three letters make my name. Take away two and I still sound the same.
I have four legs but no tail. Usually I am heard only at night.
What do angels sing in the shower?