Flower was a good metaphor for growth. The song is obviously about sexual responsibility, so that was the main metaphor. Also, it's like knowing who someone has been and remembering and appreciating that, but really appreciating what they are now even more. ↗
Living is like tearing through a museum. Not until later do you really start absorbing what you saw, thinking about it, looking it up in a book, and remembering - because you can't take it in all at once. ↗