A boy and his father from the countryside visit the big city for the first time.They went into a shopping centre and they were amazed by everything that they saw, but especially by two shiny, silver walls that could move apart and back together again.
The boy asked the father what it was. 'Son' he replied, 'I have never seen anything like this in my life.'
While the boy and his father watched wide-eyed, an old lady in a wheelchair rolled up to the moving walls and pressed a button. The walls opened and the lady rolled between them into a small room. The walls closed and the boy and his father watched as small circular numbers above the walls light up. They continued to watch as the circles lit up in the reverse direction.
The walls opened up again and out stepped a beautiful blonde, voluptuous woman stepped out of the small room.
The father and son stared at each other in wide-eyed amazement until the father said, 'Son, go and fetch your mother.'