Because it hides their teeth.
I'm Slavic and I know it"
Will you envelope with me? (I know its Corny, but it makes me chuckle.)
You get Halo-tosis. :-/
Fill 'er up!"
A: Because no one will look for them.
Hide-and-Sikh
Finks
A. Limp Bizkit. (limp biscuit) (Alternate: What do the British call a cookie that got wet )