Does a caterpillar sit on the same leaf when it's a butterfly? No! It goes for a little fly and sees something of the world. Does the tadpole stay in the same pond once it's a frog? No! It stretches its legs, goes for a jump, explores other waters. Did Cinderella go back cleaning hearths once she married the prince? ... Transformation means moving forward. If a butterfly stays on the same leaf and a frog stays in the same pond, then they may as well have stayed a caterpillar or a tadpole. There was no point in metamorphosing.