 When a prepubescent child is sexually abused by one or more other children or adolescent youths, and no adult is directly involved, it is defined as child-on-child sexual abuse.The definition includes any sexual activity between children that occurs without consent, without equality, or due to coercion, whether the offender uses physical force, threats, trickery or emotional manipulation to compel cooperation.When sexual abuse is perpetrated by one sibling upon another, it is known as "intersibling abuse", a form of incest.