If we're going down that road then:

If nothing sticks to teflon, how does teflon stick to the pan?

Uf 7/11 is open 24 hours a day, 365 days a year, why are there locks on the door?

Why do we "take a crap" when really we're leaving it there?

If buttered toast always lands buttered side down and a cat always lands on its feet, what would happen if you tied a piece of buttered toast on the back of a cat and dropped it?

If you are driving at the speed of light and you turn on your headlights, do they do anything?

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

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

Why are they called apartments when they are all stuck together?

If con is the opposite of pro, is Congress the opposite of progress?

Why do you need a driver's license to buy liquor when you can't drink and drive?

If a book about failures doesn't sell, is it a success?