Years ago the split between procreative sex and sex for pleasure were rules governing people's lives. This day in age, everything has changed. Psychoanalysis and various psychological theories have caused, for the good of all, an earthquake that determines these rigid concepts. The tendency to interpret and group emerging behaviors as "outside the norm" has led to create categories and restrictions. In this framework of encyclopedic knowledge, readers dig into the history of human sexuality and how it has changed in recent years.