I don't feel beholden to follow the real world at all. The important thing is to know WHY things turned out the way they did. You need to understand the reasons for events, or at least be able to make reasonable guesses about them.
[Wearing padding to make my breasts look larger for a movie] was great, but it also made me think, you know, a lot of women who go out and get implants, what's so insecure about them that they would rather have someone look there than in their eyes?