Porn studies is when grown-ups study movies and pictures of people being naked and doing things to each other, sometimes with themselves or sometimes in groups. They ask questions like how they affect the people who watch them, why people watch them or what they can teach us about the society we live in. It is important for these grown-ups to understand this so they can help make better and safer choices for themselves and for others. However, this is an adult topic and not something children should worry about or look at.