Can't argue with the logic
P: “I had a dream about a Penny Fairy. You leave a penny under your pillow, and she replaces it with … a quarter!”
Kate: “Wait, wouldn’t you call her the Quarter Fairy, then?”
P: “Well, no. If we did that, we’d have to call the Tooth Fairy the Prize Fairy, instead.”
Kate: “… you know, that’s an excellent point.”