The song "One Man In My Heart" by The Human League is about a deep and meaningful connection between two people. The lyrics convey the strong and exclusive love that the singer feels for their partner. The song begins with the singer being asked if they truly mean their love, to which they assert that their partner is the only one for them. The question of whether their love is forever arises, and the singer wonders how they can prove it. They believe that there is no comparison to the love they share. The chorus emphasizes the idea of exclusivity, stating that there is only one man in the singer's heart, head, home, and bed. The repetition of "Oo la la la" adds a sense of romance and passion. The second verse expresses the depth of the singer's faith and love, stating that it is stronger than existence, time, and even the sun. They describe themselves as mist among oblivion, emphasizing the transient nature of human existence. The singer acknowledges the possibility of lying to spare their partner's feelings, but ultimately values the authenticity of their emotions. They appreciate their partner's grace and face, and rejoice in the moments they share together. The lyrics also touch upon the choices and words that the partner contributes to the relationship, highlighting the need to stay committed to each other. Overall, "One Man In My Heart" is a heartfelt declaration of love and devotion, celebrating the unique connection between two individuals amidst the vastness of the universe.