What does it mean to have a dog's mouth and a sausage GIF?

Holding the dog by the mouth and holding the sausage is to lure the dog with the sausage, but you can't eat it close to the mouth.

Sending this cartoon is insulting and comparing you to a dog.

Source source:

The picture comes from a work published by a user of a video website. The video shows the owner squeezing the dog's mouth with sausage and rubbing the dog's nose. The dog tried to lick the sausage with its tongue, but it was ruthlessly rejected by its owner. Because of the puppy's expression of "life without love", it became popular on the Internet. Netizen said: harmless and extremely insulting. And comment below: not a person, but you are a real dog! Is it human nature to hold the dog's mouth and lure him with sausage?