The reason why dogs like to eat saliva may be because they have a natural tendency to explore their surroundings, including their sense of smell and taste. Dogs’ sense of smell is very sensitive, and they can use their sense of smell to explore their surroundings and understand what is happening around them. Dogs often use saliva to clean their mouths, so the saliva may have a unique smell that the dog may find pleasant.
In addition, dogs may also find saliva to have a thirst-quenching effect, as they may experience dry mouth when eating saliva. However, some dogs may like to eat spit for certain reasons. For example, they may suffer from a certain disease or nutritional deficiency, or they may suffer from some kind of psychological problem, such as anxiety or depression. If your dog frequently eats spit and exhibits unusual behaviors, it is recommended that you take him to a vet to make sure he has no medical problems.