The flehmen response (/ ˈ f l eɪ m ən /; from German flehmen, to bare the upper teeth, and Upper Saxon German flemmen, to look spiteful), also called the flehmen position, flehmen reaction, flehmen grimace, flehming, or flehmening, is a behavior in which an animal curls back its upper lip exposing its front teeth, inhales with the nostrils usually closed, and then often holds this position. Hall () pointed out that facial expressions are most useful to communication at personal and social distances, and that patterns involving touch, odor, pressure changes, and the sense of radiant heat—what Clynes () termed sentic patterns—function best as displays at intimate distances.
Mar 18, · Facial rubbing is a common behavior that helps deposit pheromone messages. Why? Cats have glands in their forehead, chin, cheeks, around the mouth, and at the base of their ears.