Beavers

Beckett:  What does that container say?
Doctor:  It says, "tongue depressors".
Beckett:  Oh, what's that?
Doctor:  They are the sticks we use to look in patients' mouths.
Beckett, Oh, are they made of wood?
Doctor:  Yes, like a popsicle stick.
Beckett:  But, what if you were looking in a beaver's mouth and it just kept eating the tongue depressors?
Doctor:  Well, I don't know...  I guess that's why we don't allow beavers into the clinic.
Beckett:  Yeah, that's a good plan.  They might eat all of the tongue depressors.