Kevin McCaffrey has contributed monologue jokes to David Letterman and once stood on stage, hosed down by Letterman with a fire extinguisher for a bit on CBS’ Late Show.

But Wednesday night’s appearance was special, for it was McCaffrey’s network TV debut as a stand-up comedian on Late Show with David Letterman. McCaffrey joked about being a newlywed, going back to Catholic mass, not needing his doctor to tell him he’s fat, and a product you don’t really expect to ever see or buy in a dollar store.

Roll the clip.