Answer:
What can be swallowed, But can also swallow you?
Bright as diamonds, Loud as thunder, Never still, A thing of wonder.
What does no man want, yet no man want to lose?
My love, when I gaze on thy beautiful face. Careering along, yet always in place, the thought has often come into my mind. If I ever shall see thy glorious behind.
What lies in a tunnel of darkness. That can only attack when pulled back?
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.