"Mary's Song (Oh My My My)" by Taylor Swift is a nostalgic and heartwarming song that tells the story of a lifelong romance. The lyrics reflect on the childhood friendship and budding love between the narrator and her significant other, referred to as Mary and the protagonist.

In the first verse, the narrator reminisces about their early days, where Mary mentioned that they were young children with innocent affection. The playful nature of their relationship is highlighted by their parents joking about them and their mothers smiling and looking up to the sky in approval.

The chorus takes the listener on a journey to their shared memories, symbolized by a treehouse in the garden. It illustrates the sweet innocence of their early years, with Mary playfully teasing the protagonist, and the protagonist running away when Mary attempts to kiss them. These moments are cherished memories, emphasizing the bond between them at a young age.

Moving to the second verse, the lyrics portray the transition into adolescence. At the age of sixteen, the protagonist starts to grow into a different person, but Mary's love still shines brightly for them. Their parents continue to make light-hearted jokes about the couple, not expecting them to fall deeply in love. Despite the changes they experience, their connection remains strong.

In the second chorus, the lyrics depict more mature moments in their relationship. They reflect on late-night escapades, lying in creek beds, and romantic disputes. These experiences illustrate the ups and downs they face as a couple. Even in difficult times, they find solace in each other's presence and the enduring bond they share.

The bridge indicates the passing of time, with a few years elapsing while they sit together at their favorite spot in town. The protagonist receives a special moment as their partner kneels down, implying a marriage proposal.

The final chorus brings the story to its beautiful conclusion. It portrays their wedding day, with the entire town celebrating their union. Both of them say "Yes" and express their love and commitment. The lyrics then fast forward to a future scene where the couple is old, aged 87 and 89. Despite their wrinkles and old age, the narrator still sees Mary as a shining star in their life, filled with love and memories.

Overall, "Mary's Song (Oh My My My)" explores the power of a childhood friendship turned into a lifelong love. It celebrates the journey of growing up together, facing challenges, and ultimately finding enduring happiness. The song captures the essence of young love, nostalgia, and the significance of shared memories.