The age at which the brain is capable of the higher levels of executive function necessary to make rational, informed decisions (not saying that such decisions are guaranteed, just that the brain is capable of considering them) is a function of biology, i.e. defined by natural law.
The legal framework of consenting age protects the abuse of a minor's inability to "think like a grown up", though it's arguable if the age of consent is too low (because biology dictates an older brain has a matured executive function capacity) or too high (because some kids, as many can attest, are wise beyond their years).
The legal framework of consenting age protects the abuse of a minor's inability to "think like a grown up", though it's arguable if the age of consent is too low (because biology dictates an older brain has a matured executive function capacity) or too high (because some kids, as many can attest, are wise beyond their years).