My parents stopped doing it for me after I called them on it at the ripe, old age of 5. With my little brother, they seemed to forget differently by not having coins on hand (because they liked to leave Susan B. Anthonys) Instead they’d leave him, $1 or $5 bills and even once (accidentally because it was dark) a $20! Then he expected big bucks each time a tooth was lost! I got jealous, but refrained from spoiling it for him. I think perhaps they secretly wanted to make up for my short-lived tooth fairy days. If, when I have children, I forget, I suspect that I will make up a crazy elaborate story about her travel route being filled with detours or something. Then again, maybe they won’t believe the tooth fairy routine for very long, just as I did.