Sometimes he curls up on my pillow during the night and I don't know he's there until I yawn and my mouth closes on a whisker.

The line captures an intimate, comic moment of cohabitation with a cat: the animal’s stealthy affection collides with the human’s unconscious habits. The surprise of “my mouth closes on a whisker” turns tenderness into slapstick, emphasizing how pets blur boundaries of personal space while still being welcomed. The sensory detail (pillow, yawn, whisker) conveys nighttime vulnerability and the way companionship can be felt before it is consciously noticed. More broadly, the quote suggests that love and comfort often arrive in small, inconvenient, bodily ways—felt as much as understood.