Can you teach a toddler to

HisBetterHalf

chew with his mouth closed?  My nephew sounds like a freaking animal when he eats.  I can't be in the same room with him when he's eating.  I never explicitly taught DD to eat with her mouth closed, but she just does it.  Probably from observing us eat that way.  Anyway, the tounge and lip smacking, not to mention food falling out of the mouth from my nephew make sme physically ill.  My SIL is aware of it, but to m knowledge hasn't done anything about it (if anything can even be done).  I'm just curious.

Bellisimo

Certainly you can and should.  Dude's gonna have a hard time when he starts dating if his folks don't teach him to chew with his mouth closed! ;-)