The song "Ain't No Sunshine" by UFO is actually a cover of the original song by Bill Withers. However, I can still explain the meaning and story behind the lyrics. "Ain't No Sunshine" is a heartfelt song that expresses the desolation and emptiness one feels when someone they love is not around. The lyrics describe how everything feels cold and dark when this person is away, emphasizing the absence of their presence. The repetition of the phrase "Ain't no sunshine when she's gone" emphasizes the depth of the narrator's longing and the void left behind. The lyrics also suggest that this person is often away for extended periods, adding to the narrator's loneliness. The narrator wonders where this person goes and ponders if they have left for good. They express that when this person is not around, their home feels cold and unwelcoming. The repetitive lines, "I know," convey the narrator's understanding and acknowledgment of the situation. They may know deep down that they should let go or move on, but they can't help but feel the emptiness when this person is gone. The struggle between wanting to leave and the sadness of their absence is highlighted in the line, "Hey, I oughtta leave young thing alone, But ain't no sunshine when she's gone." Overall, the song captures the emotional pain and longing experienced when a loved one is absent, and the profound impact their presence has on the narrator's life.