What is cockles of your heart?

The phrase "the cockles of your heart" refers to the innermost feelings or emotions, often associated with warmth, joy, or affection. It originates from the Latin "cochlea," meaning "shell," and is metaphorically used to describe the deepest parts of one's emotional being. When someone says something warms the cockles of their heart, they mean it brings them happiness or comfort. This expression often conveys a sense of nostalgia or deep emotional resonance.