Rubber's song "Happiness" is about a person realizing they have reached their limits in a relationship and it's time to move on. The lyrics suggest that the person they are in a relationship with doesn't want to stay and they don't know how to fix the situation. The singer recognizes they were in denial about how things were going in the relationship and now they feel lost. They wish they could tell their partner what to do to make it work, but they know deep down that they wouldn't be able to. The refrain, "What's the matter baby, it doesn't matter baby," shows the realization that the relationship is over and there's nothing left to salvage. The song ultimately expresses the pain of letting go of a relationship that once brought happiness.
