Fat Riddles

White, Black and Fast
Riddle:
I am white and I am black. I am not fat because I need to be fast. I confuse many people with my style. What am I?
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I Serve By Being Devoured
Riddle:
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 am I?
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