He's also one of those guys who really needs facial hair - the very fit Eric Bana is another.
I remember watching that silly film "Australia" that Jackman made with Nicole Kidman a few years back. When he was all stubbly and sweaty he looked hot as hell. Then there was a scene where he turned up clean shaven and in a white suit and... total lust killer! Think it's to do with having a weak chin.