1) Girlfriend : "...And are you sure you love me and no one else ?"
Boyfriend : "Dead Sure! I checked the whole list again yesterday".
2) Teacher : "Which is more important to us, the sun or the moon?" Pupil : "The 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".