Hello there dear @sciencetech :)
Your insight is SO accurate! I actually shared with Ruth-girl a study that supports your idea of why love oscillates throughout a long term relationship:
Adams and Munro (1978) say about levels of passionate love observed in newlyweds, which is lower than that seen in dating couples and those in a long-lasting marriage. They put his down exactly to the 'distribution of roles' which is higher early on in a marriage.
You are ON it @sciencetech :D Well done :)
Thank you for stopping by!
Really. That's great to know