Two flies order some food in a restaurant. One says: I'll take the shit with garlic. And I'll take the same, but without garlic, said the other one. I don't like to have bad breath.
Teacher : Which is more important to us, the sun or the moon? Pupil: Moon... Teacher : Why? Pupil : The moon gives us light at night when we need it but the sun gives us light only in the day time when we don't need it.