Talk:Demon Realm/@comment-3199121-20140813045342/@comment-25035274-20140813225220

More accurately, because KC said they haven't.

In setting-type-lore, the reason's probably something else entirely, because setting materials actually make it clear that the monsters aren't just having sex all the time. They lead normal lives with farming, craftsmanship, shopping, trade, etc. They just happen to spend more time in sexings mode than humans.