Answer:
Everybody's got one.
It belongs to you, but other people use it more than you do. What is it?
Tomorrow's yesterday. Yesterday's tomorrow. What is it?
A natural tattoo on babies
What does someone else have to take before you can get?
I am a cave full of bones and the house of a worm.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?