The phrase statutory rape is a general term use to describe non-forcible sexual relations that take place when an individual (regardless of age or gender) has sexual relations with an individual not old enough to legally consent to the behavior. Although it usually refers to adults engaging in sex with minors under the age of consent, the age at which individuals are considered competent to give consent to sexual conduct, it is a generic term, and very few jurisdictions use the actual term "statutory rape" in the language of statutes. Different jurisdictions use many different statutory terms for the crime, such as "sexual assault," "rape of a child," "corruption of a minor," "carnal knowledge of a minor," or simply "carnal knowledge." Statutory rape differs from forcible rape in that overt force or threat need not be present. The laws presume coercion, because a minor or mentally retarded adult is legally incapable of giving consent to the act.