Why do you have teeth?
Because I need to eat food.
Why do birds have wings?
Because they can fly.
Why do people go to restaurant?
Because they are hungry.
Why do people use umbrellas?
Because they don't want to get wet when it's rainy.
Why do you brush your teeth?
Because I want to keep my teeth clean.
Why do you wear shoes?
Because they protect my feet.
Why do people go to the doctor?
Because they are sick.
Why do people go to the cinema?
Because they want to watch a movie.