Answer:
Runs smoother than any rhyme, loves to fall but cannot climb.
Talks like this, a green wise man does. Guess my clue, you will.
A little pool with two layers of wall around it. One white and soft and the other dark and hard. Amidst a light brown grassy lawn with an outline of a green grass.
A doctor might remove one from the neck of a Dracula victim.
Two brothers we are, great burdens we bear. All day we are bitterly pressed. Yet this I will say, we are full all the day, and empty when go to rest.
Boxers do this for a living and kids do it in the backseat for free