Hans Fehlinger, Sexual Life of Primitive People
“ To most lay people the established order of sex relationships and marriage seems something so self-evident and stable that they cannot conceive the possibility of a variation in the established order. Yet here, as in all things, the law of evolution applies. Our sexual system is the outcome of a long continuous series of changes beginning with the very dawn of human history. To understand the modern sex problem rightly it is essential to know its origin and gradual development. ”
