INTERESTING CONFUSE QUESTION???

1.CAN YOU CRY UNDER WATER?
2.DO FISHES EVER GET THIRSTY?
3.WHY DO NOT BIRDS FALL OF TREE WHEN THY SLEEP?
4.WHY IS CALLED BUILD ING WHEN IT IS ALREADY BUILT?
5.WHEN THEY SAYS DOG FOOD IS NEW AND IMPROVED,WHO TASTE IT?
6.IF MONEY DOES NOT GROWS ON TREE,WHY DO BANK HAVE BRANCHES?
7WHY DOES ROUND PIZZA COME IN SQUARE BOX?
8.WHY DOES NOT GLUE STICK TO ITS BOTTLE?