Brian Regan has performed on Late Show with David Letterman dozens of times now, but his brother, Dennis, ain’t no slouch himself. Dennis returned to make another performance on Friday night’s show. With a special intro from Regis Philbin! (Not included on this video clip, however.) Dennis talks wardrobe functions, as opposed to malfunctions. Belts. Pants. Shoes. He’s got it all covered here! Fun fact. Dennis and I shared a comedy stage on Sept. 13, 2011. OK. Maybe that fact wasn’t as much fun for you. I need to come up with better facts. Let’s let Dennis Regan tell his jokes and cheer you up.