This is definitely some of the best verse ever set to music. Some songs have pretty lyrics which are terrible as poetry, but this is genuine genius and derserves the kind of analysis it's being given here. "The Queen of Hearts still making tarts" has always been one of my favorite lines from any song, mostly because it has meanings on so many levels. It does have that innocent, childlike connotation from the nursery rhyme, and also possibly the idea of prostitution, her being the "queen of his heart", and if the bakery girl story is true, there's another meaning. I beg you to remember, though, that poets often don't recognize the meaning of everything they say. A friend of mine is a decent poet, and sometimes I've known meanings of his phrases to be suggested to him which he didn't even notice until they were pointed out.