Every month the same thing: Blood flows. Half of the world's population bleeds, and yet menstruation remains a huge taboo. The most natural thing in the world is expected to happen as invisibly as possible, and "our days" should be like any other day. Well, they are not. Interestingly, there is currently a shift in the public perception of menstruation: cycle apps, dedicated Twitter accounts on the topic, and the global debate over the tampon tax are changing how menstruation is viewed. What is currently trending in America under the term "Period Positivity" is already being referred to as "Menstruation Revolution" in German media, from Spiegel to Zeit. In line with this red shift, journalist and leader of women's seminars Sabine Maier presents a witty and clever book. The centerpiece of this visually appealing book.