Unique Pairs in the Universe.
The Sun and the Moon.
The Day and the Night.
The Earth and the Sky.
The Dark and the Light.
The Cup and the Saucer.
The Shoes and the Socks
The Bread and the Butter.
The Salt and the Pepper
The Fork and the Knife.
The Pen and the Paper.
The Pencil and the Eraser.
The Needle and the Thread.
The Left and the Right.
The Tall and the Short.
The Fat and the Thin.
The Good and the Bad.
The Happy and the Sad.
The Laughter and the Crying.
The North and The south.
The East and The West.
The Latitudes and the Longitudes.
The Land and the Water.
The Hot and the Cold.
The Solar and the Lunar Eclipse.
The Bat and the Ball.
The Doors and the Windows
The Floor and the Ceiling.
The Mobile and the Charger
The Top and the Bottom.
The Up and the Down.
Man and Woman.
Father and Mother.
Brother and Sister.
The Husband and the Wife
The Boy and the Girl.