Sexual abuse, also referred to as molestation, is usually undesired sexual behavior by one person upon another. It is often perpetrated using force or by taking advantage of another. When force is immediate, of short duration, or infrequent, it is called sexual assault. The offender is referred to as a sexual abuser or molester. The term also covers any behavior by an adult or older adolescent towards a child to stimulate any of the involved sexually. The use of a child, or other individuals younger than the age of consent, for sexual stimulation is referred to as child sexual abuse or statutory rape.