I doubt 2 teens experimenting with one another would get arrested or charged, that is unless a parent complains or you're breaking another law that the police are investigating.
Making consistent laws involving any victim of rape is the best especially when the victim not an adult.
Rapes aren't always a slam dunk to convict. Also, rape claims can be coerced, done in bad blood, or retracted. If the parents forbid sex until marriage or a certain age, a child having sex sooner could say it wasn't consentual so they don't get in trouble..
While I may agree with you, I can't. Each person develops differently and even the age puberty begins can be between 9-16. Also, developmental disorders can impact ones development.