Mature readers ONLY.  The book that made the Open Gaming License not so open.

The Book of Erotic Fantasy is an OGL RPG product with rules covering many of the intimate aspects of the fantasy world. The most provocative area is the aspect of sex, however the book will not stop there. It will also cover conception, marriage, love, relationships and all of the things in a fantasy world that can help or hinder those arenas of life. It will also contain alternate magic systems based on Tantric sex, Kundalini energy and Orgone energy. There will be a variety of prestige classes that make use of sex or sexuality to forward their goals or as means of drawing energy to power their abilities. There will be spells and fests that are related in some way to all of the above. There are a number of gods appropriated to the subject and of course monsters and creatures to make the characters lives more difficult (even their love lives).