Would you ask a writer about what their writing means? First, hear (or read) what I have to say. If you ask a poet what their work is about, what sorts of questions do you think they hear all the time? 'Whats this mean? What's this about?' The artists get sick of it. Writing is a form of art. Art is meant to be not the same for everyone. Most artists want their work to be left to the viewers interpretation. Quoth one of my favourite writers:
"Does it mean this, does it mean that, that's all anybody wants to know. Fuck them darling. I say what any decent poet would say if you dared ask him to analyze his work: If you see it, dear, then it's there." - Freddie Mercury.
Artists need their privacy. They'd rather not get asked questions they've answered hundreds of times, or questions they don't wish to answer. There's sometimes a hidden meaning to a piece, but it's not always something they'd like to share. Maybe they fear of criticism, maybe they're embarrassed, maybe they won't tell you just to keep you guessing or for fun. Maybe the meaning is way too personal. Maybe the piece was right out of their imagination, or has no meaning. There could be other reasons too. But if an artist doesn't want to tell you the piece is about, don't pester them. Art is art, and it's meant to be enjoyed. Sometimes not knowing is part of the fun. It's mysterious, which the artist just might've wanted it to be. You can have any theory about a piece, and that's your interpretation.

Written in honour of Freddie Mercury and all other artists.