please tell me WHY

can anyone give the answers?

1. Why do we press harder on a remote control when we know the batteries are getting dead?
2. Why do banks charge a fee on "insufficient funds" when they know there is not enough money?
3. Why doesn't glue stick to the bottle?
4. Why do Kamikaze pilots wear helmets?
5. If people evolved from apes, why are there still apes?
6. Why is it that no matter what color bubble bath you use the bubbles are always white?
   
7. 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 hurt, you stupid idiot?"

please tell me WHY