Why is brassiere singular and panties plural?

Why do we drive on a parkway and park on a driveway?

Why do hot dogs come ten to a package and hot dog buns only eight?

Why do they put braille dots on the keypad of the drive up ATM?

Why does sour cream have a "use-by" date?

Why are there Interstate Highways in Hawaii?

If nothing ever sticks to TEFLON, how do they make TEFLON stick to the frying pan?

Why is it that when you transport something by car, it's called a shipment, but when you transport something by ship, it's called cargo?

If you're in a vehicle going the speed of light, what happens when you turn the headlights on?

Why do you need a drivers license to buy liquor when you cannot drink and drive?

Why are cigarettes sold in gas stations when smoking is prohibited there?

Do you need a silencer if you are going to shoot a mime?

Have you ever imagined a world with no hypothetical situations?

How does the guy who drives the snowplow get to work in the mornings?

If 7-11 is open 24 hour a day, 365 days a year, why are there locks on the doors?

You know how most well labeled packages say "Open Here". What is the protocol if the package says, "Open Somewhere Else"?

Why are there flotation devices under plane seats, instead of parachutes?

Why is it called a TOOTHbrush when you brush all of your teeth?

Why does the phone ring while you're in the shower, and the door bell ring just after you've stepped out of the shower?

Why isn't phonetic spelled the way it sounds?

You know that little indestructible black box that is used on planes? Why can't they make the whole plane out of the same substance?

Why is it that when you're driving and looking for an address, you turn down the volume on the radio?

When a crash-test-dummy hits his head, and no engineers record the results, does he make a sound?

If you tied a buttered toast to the back of a cat and dropped it from a great height, what will happen?

If a cow laughed, would milk come out of her nose?