Answer:
What kind of running means walking?
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.
Whilst I was engaged in sitting. I spied the dead carrying the living
What is as big as you are and yet does not weight anything?
I am the heart that does not beat. If cut, I bleed without blood. I can fly, but have no wings. I can float, but have no fins. I can sing, but have no mouth.
What did the piece of wood say when he saw the screwdriver and screws approaching?