The song "Ooh La La (Cassette Singalong)" by Daisy Jones & The Six delves into the theme of wisdom gained through experience and the bittersweet realization that comes with reflecting on past mistakes. The lyrics center around the regrets and lessons learned by the narrators, represented by Suki Waterhouse, Riley Keough, and Sam Claflin.

In the first verse, Suki Waterhouse's character refers to her "poor old Grandad" who she initially dismissed as bitter. Her Grandad warns her about women, stating that they "trap you, then they use you" while emphasizing the importance of not revealing vulnerability. This depicts a cautionary sentiment against blindly falling into the trappings of love without taking necessary precautions.

The chorus repeats the longing desire to have known what they know now when they were younger and stronger. This expresses the yearning for the insight and understanding gained through the passage of time, implying that the narrators have made mistakes and experienced hardships that could have been avoided if they had possessed such knowledge earlier.

In the second verse, Riley Keough's character speaks of a situation where affection is not reciprocated fully. When the narrator desires a kiss, they are given a cheek instead, leaving them in a state of confusion and uncertainty. If they desire more intimacy, the object of their affection is already asleep, leaving them feeling insignificant and detached. This illustrates the complexities and disappointments that can arise in relationships, providing another example of the narrators' experiences and the lessons they have learned.

The refrain "Ooh-la-la" serves as a catchy and repetitive interlude, adding an element of joy and catchy singalong to the song while not necessarily carrying a specific meaning.

Overall, "Ooh La La (Cassette Singalong)" explores the wistful regret of not having possessed the wisdom and knowledge gained through experience earlier in life. The song highlights the universal struggle of wishing to have known certain things sooner, emphasizing the value of learning and growth.