Cats are lovable because they’re so odd. One unusual trait of cats is to rub their faces on furniture, your leg, and your face, but you may wonder why cats do this.

Cats tend to rub their faces on objects for two reasons. Dr. Jennifer Coates, DVM, says that cats rub their faces on humans to mark you as part of their group. Cats have glands around their mouth, ears, chin, cheeks, and forehead that produce pheromones to make their territory.

A second reason cats rub their faces with each other as a form of greeting and to reinforce social bonding. So the next time a cat rubs its face on you or an object, you’ll know why.

To learn more about why cats rub their faces on things, click here.