Book excerpt: This book reaches the parts that other origami books don't, plumbing previously uncharted depths, uniting the yin and yang bedfellows of an ancient Japanese artform and 21st century toilet humour. Readers who hitherto have only been able to make a humble paper aeroplane, will soon be able to impress their mates down the pub with a jaw-dropping ability to take a scrap of chaste, virgin paper and fashion something that is both artistic and crude. Working through a total of 16 projects, the cultural importance of each subject and the inspiration behind it is discussed, while the origami side of things is explained in simple, step-by-step Anglo-Saxon, with evocative line drawings. Adult Origami will soon have readers making giant sperm, novelty paper boobies or a fully moving schwanstucker, impressing friends and shocking polite family members everywhere.