Answer:
Three little letters, a paradox to some. The worse that it is, the better it becomes.
What has 4 legs in the morning, 2 legs in the evening and 3 legs in the night?
I bind it and it walks. I loose it and it stops.
I am a fire's best friend. When fat, my body fills with wind. When pushed to thin, through my nose I blow. Then you can watch the embers glow.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.