The Twin Gods campaign setting:

This setting is intended for extreme fetish play in a tabletop game, as a default it includes female slavery, bdsm, incest, and bestiality. Any or all of these are viable to change at a DMs discretion, or at the request of a player.

The world has 6 major civilizations, 4 human, 1 dwarven, and 1 elven. Besides these races all the other standard creatures exist in the setting, just in smaller numbers, or scattered and underground, as is the case for orcs and goblins.

Halflings, gnomes, Tieflings, Dragonborn, any other playable race from the PHB can be assumed to exist in either small conclaves, or interspersed through the larger societies.

With all that said, the only creatures in the setting that can naturally have female members of their species are the humanoids, (this does exclude giantkin, and goblinoids). To account for this, every humanoid female’s womb can be impregnated by any living things cum, and she will give birth to a male of the other species.

This is the way of this world, as dictated by the Twin Gods.

The Human civilizations shall be fairly similar to standard 5e depictions, as will Dwarven and any other racial groups. The only major exception is the Elves, who, being immortal, Know and follow the will of the Twin Gods to the letter. All elven subcategories are united in this, and all but a small few who leave to wander the world live in the United Elven city state of Rapia.

As to the nature of the planes, I am unsure of the details at this point in time, they will be sexified in some way. And of course, if anyone has any suggestions as to how to handle anything from a thematic standpoint feel free to comment.