What is the allusion that "dogs bite, but people can't bite dogs"?

According to legend, during the Spring and Autumn Period and the Warring States Period, there was a man named Bu Xiang. One day, he came home dressed in gold and never forgot to visit his benefactor. En's family is a large local family. They keep several German shepherds to watch the house, but the dogs don't know whether they are good or bad, and they bark desperately. Unexpectedly, a dog broke free from the leash and bit his leg. When the owner saw this, he was furious and ordered the housekeeper to kill the dog, but he said, "Forget it, it's just an animal. Its performance just shows its loyalty to its owner, and it is precisely because of its kindness that it got this good dog!" " I regard him as my friend now. If my friend bites me, I don't think I will bite him again. "People listened with a smile.

First, in modern times, this sentence is often understood as: disdain to compete with others.

Second, there are famous sayings about dogs:

A well-bred dog's greatest wish is to please his friends first, and then please himself. -French silk

I love children, but let's face it, your dog won't yell and hate you like an enemy when he grows up. Barbara

Being kind to a dog may only take you a part of the time, but it will pay you back for a lifetime. If you like, a dog knows how to touch your heart. Gabriel

It is hard for people who have never owned a dog to imagine what it is like to live with a dog, and it is hard for people who have owned a dog to imagine how to live without a dog. Caroline

The greatest happiness that a dog brings to people is that when you pretend to be crazy about it, it won't make fun of you, but will be crazy with you-Butler.

For dogs, every owner is Napoleon, which is why dogs are so popular. -Huxley

Animals are reincarnated by wise men, and the wisdom accumulated over thousands of years is filled in a smaller body than people. Dogs don't use words, but speak with their whole bodies. -Lorenz