A dog's version of kissing is licking and they lick for a number of reasons. Females lick their pups to start them breathing and clean them. All dogs lick to clean themselves. Dogs lick their lips when stressed. They lick other dogs and people to show respect. They lick because they get positive attention when they do. Dogs also like the salty taste of our skin. Since dogs can and do show the same emotions we do, and love is one of those emotions, I really believe they are kissing us when they lick us.