Learn the meaning of incest. Discover when incest became taboo, and explore theories about reasons for the incest taboo.

Incest is the act of sexual intercourse between family members or close relatives. The act has been made illegal in some countries, while it is legal in others.

In this lesson, we'll describe sexual intercourse from physiological and biological perspectives. You'll explore the stages and changes that occur within the body before, during, and after sex.

Understand the physiology behind erection and ejaculation, including the key differences. Watch the video and take the quiz to review essential concepts.

Zeus only had one wife, Hera, who was also his sister. Despite the fact that incest was taboo in ancient Greek culture, the gods were considered above human constraints.

Learn about feminist theater. Explore the origin and definition of feminism and theater, analyze the features, and review examples of famous feminist plays.

Explore the theories of cultural analysis. Learn the definition of cultural analysis and understand its importance. Discover various cultural analysis examples.

Learn about the key concepts and purposes of anatomy and physiology. Understand the differences between anatomy and physiology as well as how they are related.

Learn about illusions in psychology. Explore the types of illusions, including auditory, tactile, and visual illusions, understand their causes and review examples.

Learn how to calculate the magnification of a lens, and see examples that walk through sample problems step-by-step for you to improve your physics knowledge and skills.