Answer:
What always comes into the house through the keyhole?
What is always on its way but never arrives?
We traveled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. How can that be possible?
No sooner spoken than broken. What is it?
Angels and pilots earn these.
A doctor might remove one from the neck of a Dracula victim.