Matt Damon made a grave grooming mistake on the set of his new movie The Informant yesterday. I can handle a little bit of scruff on a guy, but a full-on mustache is so '80s. Even Tom Selleck did away with his famous 'stache in 2004 for a brief stint. I know it's not Matt's fault, he has to wear it for his role in the film — but I find it so gross. How do you feel about a mustache on a man? Do you think it's sexy or awful?