Speaking Feline: The Science of the "Kitty Kiss"

For years, cat owners have noticed that when their pets are relaxed, they often look at them and narrow their eyes into a slow, deliberate blink. In 2020, scientists at the University of Sussex decided to put this behavior to the test. They published a peer-reviewed study in Nature confirming that the "slow blink" is the feline equivalent of a human smile.

The research revealed that when humans mimic this exact sequence—relaxing the face, making soft eye contact, and narrowing the eyes for a few seconds—cats are significantly more likely to slow-blink back. Even more surprising, the researchers found that completely unfamiliar cats were much more likely to approach a stranger's extended hand if the human initiated a slow blink first. In the animal kingdom, an unblinking stare is perceived as a hostile threat. By dropping their guard and closing their eyes, cats signal absolute safety, trust, and affection.