A title from the series Knowledge & Life, published by Wulf Bertram. Hormones for weddings and brain research for everyday life. Anyone who thinks science can only be presented in a boring way has yet to read one of Manfred Spitzer's entertaining books! In his latest essays, which are once again as scientifically grounded as they are amusing, he addresses not only cheesecake-addicted rats. He also tackles many other questions that have long intrigued us: We all know that too much sugar has a negative effect on body size, but did you also know that sugar helps us plan our future? Or that fathers can experience pregnancy depression and that testosterone doesn't automatically make us more aggressive? Why are teenagers so interested in sex and crime, and how do love and sex change our thinking?.