Answer:
I am needed for most animals and hardcover books. What am I?
I am a king who's good at measuring stuff.
The more it dries the wetter it gets. What is it?
I am just two and two. I am hot. I am cold. I am the parent of numbers that cannot be told. I am a gift beyond measure a matter of course. I am given with pleasure when taken by force.
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.