Did you know if you breathe through your mouth only, it makes little pits all over your maxilla (bone where your top teeth go)? Seriously, you can tell if someone breathes through their mouth by looking at their skull. Well, "breathed", because I guess they wouldn't be doing it any more at that point.
Come on, you know it's fascinating.
The only time I've had a problem with fogging is when it's really cold out side and we're doing a nighttime, outdoor activity. I was in a fairly warm climate, though, so that didn't happen very often. Are you the same Badger that lives in Southern California and helped work on the clone troopers? You probably won't have to worry too much about fogging in California.