The song "Ain't No Doubt" by Jimmy Nail tells the story of a relationship ending and the emotions that come with it. The lyrics depict a conversation between the narrator and his partner, who tells him that she needs time and space to find herself again. However, the narrator can sense that she is already emotionally detached, as her heart is "walking down the street." Despite claiming that she loves him and doesn't want anybody else, the narrator knows that she is lying. He questions why she pretends and asks her to be honest with him. He realizes that a woman like her is not good for him because her heart is already invested in someone else. The narrator acknowledges that she references the saying "if you love someone, set them free," comparing their situation to a song lyric. However, he hopes that he can deceive himself better than she can deceive him. He reluctantly accepts her decision and hopes that she will return to him in the future. Overall, the song conveys feelings of betrayal, heartbreak, and the realization that the relationship is over. The narrator acknowledges that he is a fool for hoping for more and that he should let go, even though it is difficult for him.