Who says adult conversations has to be rule breaking, not sure where there was talk about being able to talk about things not allowed either.
Personally I looked at this as in sitting down with a group of people at an older age and see how it acts out to most of the convos that starts in the game. Would be interesting to be honest if there's any greater changes. Adult conversations doesn't has to be about adult "content", right?
But who knows, maybe someone else didn't mean this.