When you can wiggle your tooth with your tongue....

....it will fall out soon.
That would seem like a good answer to the repetitive question "When will my tooth fall out?" Unless your tongue is really strong.
In that case its useless and just causes a worse repetitive problem that has to do with "Look, I can wiggle it with my tongue." " When will it fall out?""See?!" "Mom, LOOK." "You said when my tooth can wiggle with my tongue it will fall out, Huh?!"

Here is my new statement:
"When you can spin your tooth all of the way around in a complete spin, it will fall out soon."