The author is Marlon Mattedi, one of Brazil's biggest names in human sexuality, having provided more than 10,000 clinical consultations, helping people to improve their sex lives. He is a psychologist with a Master's in Sexual Therapy from the Brazilian Institute of Sexology and Psychosomatic Medicine of São Paulo. He was also named a specialist in Sexuality by the Brazilian Society of Human Sexuality Studies (SBRASH), in São Paulo. Additionally, he is a specialist in Sexual and Couples Therapy and Orientation for the Sexpol Foundation in Madrid, Spain, which is connected to the European Society (FES) and the Global Society of Human Sexuality (WAS). From this point, you will obtain knowledge that the majority of people do not possess. Enjoy.