Why do cats make a funny face?

[Sassy]

You may occasionally notice your cat making a strange face: a lip-curling grimace with the mouth half open, a wrinkled nose, raised chin and a gaping tongue. It is usually accompanied by a hypnotic stare. This is known as the Flehman response and, although it may be disconcerting, your cat only makes the face when he wants to get a better smell of something, usually the pheromones of another cat.

Click for article