Theme songs tell us the story of a life, real or fictional, in just a few seconds. Words aren’t required, nobody can hear the opening sounds of the Star Trek theme song and not know what is happening. It is so strong that a bar or two and they can twist it and your mind somewhere else.
The theme from Jaws is still used in paradies and to tell people that what they seeing hides what’s beneigh the surface.
Sometimes lives have theme songs. This is the song that will be played at my daughters wedding. Not sure when, but it will be played.