One example agreeing with this idea is: In Swedish north, word for "yes" is pretty much shaped by what would be easiest sound to produce when one's lips are fr

One example agreeing with this idea is: In Swedish north, word for "yes" is pretty much shaped by what would be easiest sound to produce when one's lips are frozen: http://www.youtube.com/watch?v=URgdIAz4QNg http://www.youtube.com/watch?v=URgdIAz4QNg