Answer:
You have it even if there is none.
There's one in every deck of cards and in a famous movie
What is in seasons, seconds, centuries, and minutes, but not in decades, years, or days?
What gets wetter and wetter the more it dries?
What can travel around the world while staying in a corner?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?