It's about sex it's about being a kid it's about growing up it's about being a girl and being a woman it's about leaving home it's about coming back different it's about ownership and self it's about men it's about being alive it's about everything
Laughing in a not completely mean manner at the people who take this literally, the core is in the science fiction of it all it gets to be what you want it to because none of it is real.
It is also insanely good looking and very well acted (minus some muddled British accents thrown in).