Answer:
What falls down but never breaks?
Bobby likes Jimmy but not Joe, apples but not pears, jeeps but not vans, shinny but not hockey, tennis but not squash. Who will he like, Sara or Sally?
What can speak without a tongue and listen without ears?
They are two brothers. However much they run, they do not reach each other.
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
Two little holes in the side of a hill. Just as you come to the cherry-red mill.