Oh Darling by Supertramp is a heartfelt song that delves into themes of love, longing, and heartbreak. The lyrics express a raw emotional plea to a loved one, asking them not to leave and to remember the good times they shared. The key themes include romantic desperation, emotional vulnerability, and the pain of potential separation. Particularly poignant moments in the song are the repeated refrains where the singer professes their undying love and begs their partner to stay. This emotional intensity, coupled with a soulful melody, makes the song resonate deeply with listeners.