Find a way to make everyone monster girls and monster guys.

"Wouldn't it be amazing if everyone was some kinda monster person, monster girls and monster guys? Sex could be more open, everything would be so much more interesting!" Suddenly, it felt like my body's temperature dropped ten degrees. Before I could try and stop anything, I felt the world turn, and we suddenly weren't the only monster people in the classroom. Harpy's, Merpeople, Goblins, Imps, Werewolves, everyone was some sort of monster. Haruhi had just changed the world, in a way unlike anything she'd done before. Had becoming a succubus changed her impulse control or something?