A series about one of the most powerful driving forces that exists in nature – sex. Without it humans and all the animals we see around us would not exist. The world would be dull and colourless, animals would not need to find a partner and there would be no brilliant courtship, colours and displays. Using a multitude of unique and beautiful images this major series explores the world of sex. By comparing ourselves with other animals, the series presents an extraordinary view of human sexuality, guaranteed to change the way the viewer looks at their own, as well as others’ behaviour. Produced by Genesis Films for Channel 4.