Answer:
What kinds of men are always above board?
Turns us on our backs, and open up our stomachs. You will be the wisest of men though at start a lummox.
What measures out time until in time all is smashed to it?
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own.
What five-letter word becomes shorter when you add two more letters?
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.