Why Do Dogs Lick Each Others Mouths


Dogs are known for their unique behaviors and actions, which often leave us wondering about the reasons behind them. One such behavior is when dogs lick each other’s mouths. This act has been observed in many different breeds of dogs and can be seen as a way of showing affection or communicating with each other. In this article, we will explore why dogs lick each other’s mouths.


1. Communication through scent

Dogs rely heavily on their sense of smell to communicate with each other. They have a special organ called the vomeronasal organ, which allows them to detect pheromones and other chemical signals in their environment. When dogs lick each other’s mouths, they are exchanging these scents and using them to communicate.

2. Submission and dominance

In some cases, licking another dog’s mouth can be a sign of submission or dominance. Dogs use body language and other non-verbal cues to establish dominance within a pack or social group. Licking another dog’s mouth can be seen as a submissive gesture, indicating that the dog recognizes the other dog’s higher status.

3. Grooming behavior

Dogs are known for being clean animals and often engage in grooming behaviors to maintain their hygiene. Licking another dog’s mouth may be seen as a way of helping to clean that dog’s teeth or gums, much like humans do when flossing or brushing their teeth.

4. Affectionate behavior

One of the most common reasons why dogs lick each other’s mouths is simply out of affection. Dogs are social creatures by nature and thrive on physical contact with others, whether it be through cuddling, playing, or licking.

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5. Taste preference

Lastly, it is possible that some dogs simply enjoy the taste of another dog’s saliva. While this may seem gross to us humans, it is important to remember that dogs have different dietary needs and preferences than we do.


In conclusion, there are many different reasons why dogs lick each other’s mouths. Whether it be for communication, dominance, grooming, affection, or taste preference, this behavior is a natural part of canine social interaction. As dog owners and lovers, it is important to understand these behaviors and appreciate them for what they are – unique expressions of our beloved furry friends. So the next time you see your dog licking another dog’s mouth, remember that there is no need to worry or be grossed out – it’s just dogs being dogs!