A man and women walking down the street holding bags in their hands and smiling both wearing black and white clothes.
A husband and wife lay on the beach.
It is impossible for a man and woman to walk and lay down at the same time.
One cannot be walking and laying down at the same time. One cannot be both on a street and on a beach at the same time.
A man and a woman cannot be walking at the same time they lay on the beach.