I've been kicking around this idea for a porn plot in my head, but I dunno if it has any potential.

You'd basically be playing as the disfavoured son of a king, and one day in a carriage ride your elder brother tries to have you assassinated. Your assassins get dispatched by goblin women who just showed up because they rob anyone on the road. You get kidnapped by them and basically have to convince a tribe of retarded goblin women to make you their chief, along the way you improve their lives by introducing stuff like irrigation, farming, and other advancements etc. It would end with you maybe uniting their clans and taking your kingdom by force with a goblin girl as your queen.