Why?

How come French fries are not considered a vegetable, they are just deep fried potatoes?
If conjoined twins participate in sports, do they count as one or two players?
Can someone have their head in the clouds and be down-to-earth at the same time?
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?
Can fat people go skinny-dipping?
Why is it when two planes almost hit each other it is called a "near miss"?
Why is it that when you're driving and looking for an address, you turn down the volume on the radio?
Why is it called 'after dark', when it is really after light?
Why is it called a TV "set" when you only get one?
Why is a person who plays the piano called a pianist, but a person who drives a race car not called a racist?
Why don't you ever see baby pigeons?
Why do we wash bath towels? Aren't we clean when we use them?
Why do we drive on parkways and park on driveways?