Like an awful lot of PG songs, I think this is about difficult and faltering relationships, in this case a couple who just stayed together too long and made each other miserable, when they should have split up long before and been happier.
The key line, I think, is "Do those teeth still match the wound?" I wondered for years what that line meant, and eventually decided it refers to sinking your teeth into someone, refusing to let them leave, bloody-mindedly maintaining a relationship which is making one or both partners unhappy. The bite wound is still there, it hasn't healed, because you just won't let go.
Like an awful lot of PG songs, I think this is about difficult and faltering relationships, in this case a couple who just stayed together too long and made each other miserable, when they should have split up long before and been happier.
The key line, I think, is "Do those teeth still match the wound?" I wondered for years what that line meant, and eventually decided it refers to sinking your teeth into someone, refusing to let them leave, bloody-mindedly maintaining a relationship which is making one or both partners unhappy. The bite wound is still there, it hasn't healed, because you just won't let go.