The answer is "no". While some people believe that dogs show affection by licking their faces or rubbing themselves against their owners, this is incorrect. The only thing that dogs get out of these actions is a sense of comfort from being petted. Dogs also express affection through vocalizations such as barks, growls, and whines. These sounds can be used to tell their owners that they need something, want something, or are feeling threatened. This is why many dog trainers recommend using positive reinforcement training methods with their clients' pets. In addition to vocalization, dogs use other forms of communication to show affection. For example, if someone gives a dog a treat, the owner will often receive a wag in response. If an owner hugs a dog, he may receive a lick on his face or neck. Dogs also have a complex social hierarchy and will often use body language to show how much they like or dislike another animal.