No1: Don't tell everything you know.
Is it in
8 fingers and 2 Thu"ums... Unless the dragonborn only has a Haafingar
Because they lactose I don't know why I found this so funny! ready for the down vote to begin 3
Oh, you don't know I won't ask you to wipe my bum then.
Cottontales
Because if it were invented anywhere else, it'd be called a teethbrush.
Hard work and dedication.
SUCCESS