The song "I Love It When You Smile" by UB40 is a heartfelt love song that expresses the deep adoration and joy the singer feels when their partner smiles. The chorus repeats the sentiment of this love and the happiness it brings to the narrator. In the lyrics, the singer emphasizes how their partner's smile is a constant source of happiness for them. It brings them immense joy and comfort, making them feel complete and loved. The line "And you know my heart, that's no word of a lie" indicates the sincerity and authenticity of the singer's feelings. The song goes on to say that every day spent with their partner reveals something new and amazing about them. The narrator expresses their profound love, stating that they can never imagine living without their partner. They believe in their partner wholeheartedly and promise to always be there for them. The lyrics capture the powerful emotions associated with being in love and emphasize the significance of the partner's smile. It symbolizes their happiness and emotional connection, leading to a strong bond between them. The singer feels grateful for having found their partner and promises to remain by their side forever. The final verse acknowledges that the partner may have heard similar promises before and may be skeptical. However, the singer assures them that no one else will love them more sincerely than they do. They strive to reassure their partner that their love is genuine and everlasting. Overall, "I Love It When You Smile" is a beautiful declaration of love, expressing the singer's deep admiration for their partner's smile and their commitment to always be there for them.