Our distant ancestors lived in accordance with their desires and actions with the surrounding nature, and in pristine naivety called things by their proper names. The natural in their understanding was not shameful - and therefore those who find something indecent in myths and legends are just betraying their own thoughts spoiled by civilization. This fully applies to that wide range of situations, concepts and those that are somehow united by the word "sex." This area of ​ ​ mythology arose simultaneously with Homo sapiens, and it is at least stupid to abandon it. But knowing what place sex occupied - the most important side of the life of every normal person - in the ideas of people of antiquity is not harmful to anyone. The book of the writer and historian Vladislav Petrov covers the myths, legends and traditions of almost six hundred peoples - both disappeared and living today. Most of the plots mentioned in it are first published in Russian.