Mostly Ghostly (Background Round)

I'm mostly a ghost, but I still have my head.
I don't mean to boast, but I'm better than dead.
For, those folks in graves are still lying intact,
And each ghost behaves as though all-dead, in fact.

I keep my mind here, in my hands, at my side.
But, yes, through my ear all my brains seem to slide.
Oh, I love my head; I was clever in life,
But witlessness dread, so beware of my scythe.