The popular songs that came out of Broadway and Tin Pan Alley from about 1920 until the start of rock 'n' roll feature very clever lyrics, strict meter, very intricate rhymes, and yet have clear meanings and (for the most part) good English and good grammar.
They are, however, often full of cultural and topical references, and sly double-entendres (hidden references to sex).
Cole Porter, "Anything Goes:"
In olden days, a glimpse of stocking
Was looked on as something shocking,
But now, God knows--
Anything goes!
Good authors, too, who once knew better words,
Now only use four-letter words
Writing prose--
Anything goes!
If driving fast cars you like,
If low bars you like,
If old hymns you like,
If bare limbs you like,
If Mae West you like,
Or me undressed you like,
Why, nobody will oppose;
When every night the set that's smart is in-
Truding in nudist parties in
Studios--
Anything goes!
https://www.youtube.com/watch?v=p9BMRQzJJBY