When a perpetrator intentionally harms a minor physically, psychologically, sexually, or by acts of neglect, the crime is known as child abuse. Child sexual abuse, also known as CSA, is a form of child abuse that includes sexual activity with a victim under the age of 18 years old. While there are many forms of child sexual abuse, and CSA does not need to include physical contact between a perpetrator and a child, it’s important to know that, at no point can a child consent to any form of sexual activity and sexual advances — period.