Where I am. the law on the age of consent contains a strong exemption for cases where the age difference is small. The age of consent is 15, but if a 15yo and a 14yo have sex and are fine with it, their parents can scream their lungs out, the police will immediately dismiss it. Because our lawmakers remembered the purpose of the law: To stop adults from having sex with children, not to stop teenagers from having sex with each other.
This is also something I've wondered about the US legal system, how much extra information is written into law? Where I am, in Sweden, which uses a different legal system, most laws come with instructions for how to interpret it. Does this exist in the US? Or is this built up by judges?