This is indeed true. But we should also think like this, if there is no value of mutual use between people, then what else can people talk about? It is precisely because of the benefits

This is indeed true. But we should also think like this, if there is no value of mutual use between people, then what else can people talk about? It is precisely because of interests that strangers have a common topic. Many people are also in the process of mutual use, found that some people can further develop into personal friends, even between friends, but also because of mutual use, there are more topics to talk about, otherwise there is nothing to communicate, just booing and asking for warmth, can not enhance understanding.