Answer:
What can you put in a barrel to make it lighter?
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.
You’ll have me at night and if you remove the first letter I denote the top, such as on a train
Take off my skin, I won't cry, but you will.
What is the freedom of birds and the pen of old men?
What do angels sing in the shower?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?