Magic

Magic exists in the KPverse. It is relatively rare in canon, but Monkey Fist in particular deals with magical artifacts and the monster the Jackal was the product of ancient Egyptian magic.

The sword the Lotus Blade (Monkey Fist tie in) can assume any shape. That could come in handy as a sex aid, but it isn't clear who besides Ron can use it, and he already has nice standard equipment.

There are essentially no limitations on magic, but it shouldn't be the focus of the story or threaten the end of the world, this is sex fiction, not darkly apocalyptic garbage. Magic should only come in if necessary. Love potions and mind control already exist in canon mad science for the show.