Eskimo kissing
Eskimo kissing, named for its prevalence among the Inuit, is actually a misnomer. Instead of a traditional kiss, an eskimo kiss consists of two people rubbing noses together. A common misconception is that the practice arose so that Inuit could kiss without their mouths freezing together, but a more logical explanation has to do with being able to catch the scent of another person.
Similar traits are shown in greetings of other races, notably the hongi greeting used by the Māori of New Zealand.