In common law jurisdictions, statutory rape is nonforcible sexual activity in which one of the individuals is below the age of consent (the age required to legally consent to the behaviour). Although it usually refers to adults engaging in sexual contact with minors under the age of consent, it is a generic term, and very few jurisdictions use the actual term statutory rape in the language of statutes. It is also considered as statutory rape even if the victim is above age of consent, and if the perpetrator is in an authority position such as a teacher, a doctor or a parent. Different jurisdictions use many different statutory terms for the crime, such as sexual assault (SA), rape of a child (ROAC), corruption of a minor (COAM), unlawful sex with a minor (USWAM), carnal knowledge of a minor (CKOAM), sexual battery or simply carnal knowledge. The terms child sexual abuse or child molestation may also be used, but statutory rape generally refers to sex between an adult and a minor past the age of puberty, and may therefore be distinguished from child sexual abuse. Sexual relations with a prepubescent child is typically treated as a more serious crime. In statutory rape, overt force or threat is usually not present. Statutory rape laws presume coercion, because a minor or mentally disabled adult is legally incapable of giving consent to the act. Age of consent In many jurisdictions, the age of consent is interpreted to mean mental or functional age. As a result, victims can be of any chronological age if their mental age makes them unable to consent to a sexual act. Consensual teenage sex is common in the United States. A 1995 study revealed that 50% of U.S. teenagers have had sexual intercourse by the age of sixteen. It is estimated that there are more than 7 million incidents of statutory rape every year. However, it is clear that most incidents are not prosecuted and do not lead to arrests and convictions. Laws vary in their definitions of statutory rape.