Dogs kiss when they are curious among the emotional state of the owner, this act is to gather information and is achieved through the receptors in their nose and mouth that can be used to interpret scented molecules. In a case where the owner is stressed, dogs initiate good interactions which cause changes in dopamine and beta-endorphins. So, literally, dogs do give the best kisses. This sign could be hanged on doorways, hallway and living room. It could serve as a warning sign to those who are allergic to dogs.