And they don't ask a married couple with no children Why don't you have any children?.
他们也不会问结了婚没有孩子的夫妇“你们为什么不要孩子?”。
You can imagine how useful this is, particularly in countries like China and Japan, which use written characters not letters.
你可以想像得到,特别是在中国和日本这些使用文字而不是字母的国家,这是多么有用处!