"Oddly enough my entire department is sort of accidental skinny guys." Is this a recent thing? Or have you all been there a while? The reason I ask is I read an interesting piece on social influences. So, if you've all been there a while and are openly health conscious and anti-fat to whatever degree... it might well be more than accidental.  Thinness might be highly contagious in your office... Here's the link: http://ucsdnews.ucsd.edu/archive/newsrel/soc/07-07ObesityIK-.asp