What is a one-sentence summary of the following article?
Any type of sexual contact between an adult and a minor is considered abuse. An adult might make threats or use their position of power (as someone most people normally trust, like a coach or teacher) to bully or frighten a younger person into having sex or other sexual activity. If your parents watch you undress (without helping you get dressed), take pictures of you without any clothes on, touch the areas of your body that are private in a way that makes you scared or uncomfortable, or pressure/force you to look at or touch their private parts, that is sexual abuse. Sometimes being touched sexually can feel good, which can be confusing. The person doesn't have to be hurting you for it to be sexual abuse. Not all sexual abuse leaves a physical injury, but many acts of sexual abuse do leave bruising, bleeding, and other injuries. Sexual abuse can also cause sexually transmitted infections and even pregnancy in some cases. Common symptoms of sexual abuse include, but are not limited to:  Difficulty walking or sitting because of physical pain  Bruises, pain, or bleeding from your penis, vagina, or anus Painful discharge during urination or other sign of an STD, frequent yeast infections or urinary tract infections Parents should not be exposing you to pornography, or creating pornography about you. Some of this involves grooming, or exposing you to sexually explicit content, to make you more open to doing it. Or they may use videos/images of you for sexual use, by themselves or others.  Exposing you to pornography on purpose (videos, photos, books, et cetera) Videotaping or taking photos of you naked, for sexual purposes Writing about your private parts Sometimes a child is sexually abused by another child. When this happens, it is usually because the first child is reenacting abuse that was forced on them. Most children do not have an understanding of sex, so generally if another child forces you or a sibling to engage in some type of sexual behavior, it's usually a sign that the child was abused by someone. Talk to a trusted adult if you think someone you know is a victim of sexual abuse, just as you would talk to a trusted adult about your own parents abusing you.

Summary:
Identify inappropriate behavior from your parents. Recognize physical injuries from sexual abuse. Recognize sexual exploitation regarding media. Understand child-on-child sexual abuse.