Child abuse may involve physical abuse that causes injury. The most obvious types of physical child abuse include children who are beaten, burned, or shaken. Child abuse may involve sexual abuse, although sexual abuse need not result in physical injury to the child for it to be illegal. Sexual abuse may include inappropriate touching, fondling, or even sexual intercourse. Finally, child abuse may involve neglect that places a child at risk, such as when a child who is left alone without adult supervision, or a child who is left enclosed and unattended in a car.