I thought the lyrics were "Wouldn't It Be Nice" perfectly clear. The very next line "And wouldn't it be nice to live together" emphasizes that it isn't age tha

I thought the lyrics were "Wouldn't It Be Nice" perfectly clear. The very next line "And wouldn't it be nice to live together" emphasizes that it isn't age that is being desired, but the social roles that come with being older. The singer is resenting that saying good night is followed by leaving to separate houses, that they then wake up in separate locations. That those are moments they could be sharing together, but due to the narrator's age, they aren't allowed to.