Answer:
There are two meanings to me. With one I may need to be broken, with the other I hold on. My favorite characteristic is my charming dimple.
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
What is long and slim, works in light. Has but one eye, and an awful bite?
What asks but never answers?
What can you share and still have all for yourself?
I am your mother's brother's only brother in law. Who am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?