我们习惯的观念是尽可能地降低成本,或许根本没有想过没有成本的世界会怎样。一个有趣的现象是,人们的言论五花八门,可是行为却出奇的一致。为什么求婚要送上大戒指?为什么结婚女方要彩礼?不要以为这是封建、是落后,这是 The idea we are accustomed to is to reduce costs as much as possible, perhaps not thinking about what a world without cost would be. An interesting phenomenon is that people’s opinions vary widely, but behavior is surprisingly consistent. Why marriage proposal to send a big ring? Why wedding party to bride price? Do not think this is feudal, is backward, this is