Answer:
How could all of your cousins have an aunt who is not your aunt?
How is it possible to always find what your looking for in the last place you look?
A man is twenty years old but has only had five birthdays. How is that possible?
What goes up the hill and down the hill, And spite of all, yet stand still?
Mary gets in the shower, but surprisingly her hair is not wet when she gets out. How is this possible?
What never gets any wetter no matter how hard it rains?