Answer:
My first master has four legs, my second master has two. My first I serve in life, my second I serve in death. Tough I am, yet soft beside. Against ladies cheeks I often reside.
I drive men mad for love of me. Easily beaten, never free.
I crawl on the earth. And rise on a pillar.
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!
There is an ancient invention. Still used in some parts of the world today. That allows people to see through walls.
It weighs next to nothing but no one can hold it for long. What is it?