It is well known that Freud laid great emphasis on sexual matters. In the years that followed, a distinction was drawn between sex and gender, and the idea of gender identity was introduced. Human beings do not spend every minute of their lives copulating, but at every minute of their lives their gender identity is present. Sex Makes the World Go Round implies that sex is everywhere, provided that we take into account both sexuality and gender identity. This book continues to develop The author's work concerning sexuality and gender identity. There are two main themes which run through the whole of this book. The first is the distinction, established by Freud and based on clinical data, between the two currents of sexuality: tenderness and sensuality. The other is that women have always been treated as inferior beings. They have always lost out whenever sexual wanderings have been uppermost.