this where you were legitimately considered competent to give consent, on sexual intercourse.
this where you were legally considered to be mature enough to engage willingly in sexual activity.
an age, fixed by statute and differing in different jurisdictions, from which one is competent to offer permission. Intercourse with a lady child under the age of permission is punishable as rape.
the minimal age for marrying without parental consent or even the minimal age for consensual intimate relations; sex at an earlier age can lead to a charge of attack or statutory rape; this differs in different states of the Union