Elizabeth was the daughter of friends of mine. Sha was an only child, aged about five at the time of this story. She longed to have a sister or a brother, so one day her parents sat her down and explained, in a form adapted to her age, the way that human reproduction works. They told her that they were trying to make a baby sister or brother for her, but could not be sure of success.
Eizabeth listened attentively, but made no comments. Then she went away to play with her toys. Nothing more was said and life continued as usual.
However, that day, late in the evening, when Elizabeth’s parents had gone to bed, Elizabeth tiptoed to their bedroom door and opened it a crack. Entering just her head into the room she said,
« When you make the baby, could you please make twins instead of just one !! »