-Is there ever a day when mattresses aren't on sale?
-If people evolved from apes why are there still apes?
-Why does someone believe you when you say that there are 4 billion stars but checks when you say that the paint is wet?
-Why do you never hear father-in-law jokes?
-If swimming is so good for your figure, how do you explain whales?
-How do those dead bugs get into enclosed light fixtures?
-Why does superman stop bullets with his chest but duck when you throw a revolver at him?
-Why do people constantly turn to the refrigerator with the hope that something new to eat has materialized?
-Why do banks charge a fee on "insufficient funds" when they know that there is not enough money in the account?
-Why doesn't Tarzan have a beard?