She denied that there was any purposeful sexual inuendo to the song. I was about 10/11 years old when it came out and I never saw it as a metaphor for sex or “naughty” but then I didn’t know much about sex at that age (OK a just a little as my mom tried to have “The Talk” with me but left a lot out and my older brother’s wife stepped in and filled me on what she thought I needed to know at that age).
https://en.wikipedia.org/wiki/Brand_New_Key#Possible_sexual_innuendo
Her song “What Have They Done to My Song Ma” even though released, I think before or at the same time as Brand New Key, could well be about it and about how artists songs are either misinterpreted or used for commercials.
“My idea about songs is that once you write them, you have very little say in their life afterward. It’s a lot like having a baby. You conceive a song, deliver it, and then give it as good a start as you can. After that, it’s on its own. People will take it any way they want to take it.”
https://www.youtube.com/watch?v=r44Ach4mXE4
Look what they’ve done to my song, ma
Look what they’ve done to my song
Well they tied it up in a plastic bag and they turned it upside down
Look what they’ve done to my song, ma.
Look what they’ve done to my song, ma
Look what they’ve done to my song
It’s the only thing I could do all right and they turned it upside down
Look what they’ve done to my song, ma.
“She denied that there was any purposeful sexual inuendo to the song.”
That’s interesting, but hard to believe.