If your tooth is really, really, really loose and your mom, dad, and brother all tell you to "please pull that darn thing"...you should pull it.
Otherwise, you will be eating a pretzel and not realize it has fallen out.
And then you will swallow it.
You will be very upset.
But your mom will assure you that the Tooth Fairy will still visit as long as you leave a note:
I lost my tooth.
I swallowed it.
There is a big hole.
Please still visit me.