sexual intercourse with a girl who has not reached the age of consent (even if both parties participate willingly)

Sexual activity by an adult with a person under the age of consent.

Sexual relations with a person who is not old enough to consent. It can be a crime even if the person tells you they are of legal age. See also: Age of consent.

The common law definition of rape has not proven adequate to reflect modern values. It is limited to sex without consent and with a woman, and only where the victim is not the wife of the rapist. Many states have enacted laws which include under the charge of rape, sex with a minor even if done with the minor's consent, sex without consent regardless of whether the victim is male or female, and sex without consent regardless of the matrimonial bond between victim and rapist.

Sexual intercourse with a girl who hasn't reached the age of consent.

Statutory rape is the crime of sex with a minor under the age of consent (AOC). Statutory rape differs from other types of rape in that overt force or threat need not be present. By law (statute), any such sexual activity is assumed to be coercive since the minor is considered in law as unable to give consent to the acts.