not really something I look into as I am straight but I do follow MMA, Frank fights HW and generally dosn't have to cut much if anything to make 265 so you arn't likely to see him in less then his underwear/compression shorts at weigh ins
Funny thing, when I was training NoGi JJ/BJJ my instructor had very similar facial features to Frank Mir. We also had a guy that looked a lot like Robert Duvall in the class. In fact I once slipped and said Robert Duvall caught me in an Armbar.
Actually continuing with this for a moment, Sean O'Haire from WCW and WWE trained there from time to time as well as a guy with a small part in the Revelutionary War movie "The Patriot"
He was the Redcoat who was holding one of Mel Gibson's son's and caught a knive or tomahok to the head.
Very nice guy actually, Sean O'Haire to be blunt was an ass.