Why? you ask?

Why do banks charge a fee on "insufficient funds" when they know
there is not enough money?
Why do people keep running over a string a
dozen times with their vacuum cleaner, then reach down, pick
it up, examine it, then put it down to give the vacuum one more chance?
Why do we press harder on a remote control when we know the batteries are getting dead?
When we are in the supermarket and someone rams our ankle with a shopping cart then apologizes for doing so, why do we say, "It's all right?" Well, it isn't all right, so why don't we say, "That really hurt, why don't you watch where you're going?"
How come you never hear father-in-law jokes?
Why do people constantly return to the refrigerator with hopes that something new to eat will have materialized?