My Rosiegirl sucks on her finger... when she's sleeping, watching t.v., or riding in the car.
One day when we were riding in the car, I noticed that she was sucking her finger again. Since the "diaper fairies" were successful in helping with potty-training, I thought maybe I could introduce her to the idea of "finger fairies." So I said to her, "Rosie, what do you think the finger fairies would say if they saw you sucking on your finger?"
Except I had some trouble with all the "f's" in that sentence, and I didn't end up saying "sucking."