Answer:
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
Slayer of regrets, old and new, sought by many, found by few.
What get wet while drying
What can be filled with empty hands?
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
What never gets any wetter no matter how hard it rains?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?