I think he means "that you want to have freedom".

Personally I don't believe in those explanations. Freud would have said that flying had something to do with sex. To me dreams are just warped memories mixed with randomness.
In lucid dreams however you just do what you want to do, nothing subconscious. I fly in a LD because I want to fly, not because I want to be free.
If you've got some serious problems you could try to interpret your dreams, but otherwise I'd just have some fun if I were you.