Tell me why :)

• Why do you need a driver's license to buy liquor when you can't drink and drive?
• Why isn't phonetic spelled the way it sounds?
• Why are there interstate highways in Hawaii?
• Why are there floatation devices under airplane seats instead of parachutes?
• Why are cigarettes sold in gas stations when smoking is prohibited there?
• Do you need a silencer if you're going to shoot a mime?
• Have you ever imagined the world with no hypothetical situations?
• How does the guy who drives the snow plow get to work?
• If the 7-11 is open 24 hours a day, 365 days a year, why are there locks on the doors?
• If a cow laughs, would milk come out it's nose?
• If nothing ever sticks to TEFLON, how do they make TEFLON stick to the pan?
• If you tied buttered toast to the back of a cat and dropped the cat from a height, what would happen?
• If you're in a vehicle going at the speed of light, what happens when you turn on the headlights?
• You know what to do when a label on a package says "Open Here." What is the protocol if the label says "Open Somewhere Else."?
• Why do they put Braille dots on the keypad of the drive-up ATM?
• Why do we drive on parkways and park on driveways?
• 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?
• Why can't they make the whole airplane out of the same material as the indestructible black box?
• Why is it that when you're driving and looking for an address, you turn down the volume on the radio?