I was interested in wife swapping. I watched AV wife swapping movies (I forgot my name, but it doesn't matter. There are too many such movies). On a whim, I searched on Baidu. On Baidu, there were many definitions and explanations of wife swapping. One of the articles said: Wife swapping games, that is, exchanging their respective objects to satisfy their sexual desires. This game is more common in Europe and the United States. Due to the influence of Western thoughts, in China, wives swapping players have gradually spread.