After a very long absence, Kenneth Keith Kallenbach returned to the Howard Stern Show today to debut the comedy act that he'll be performing with Artie Lange this weekend in Philadelphia. Howard was trying to remember the last time Keith was on the show and everyone thought it was somewhere around 10 years ago. Kenneth said he was actually on briefly a few years ago, but that was it. Howard said that Kenneth would call us and write us about twice a week saying we needed to have him on again. Howard said he's curious about his stand up so that's why he's on today. But there was a catch; Howard said that Kenneth had to get in the Robospanker and do some of his stand up. If a joke didn't make anyone laugh he would get a spank. Gary asked Howard if Kenneth should have to strip down to his underwear for this and Howard said no way, he didn't' want to see that. Then he called Gary gay for even thinking that (a point reinforced by a sound clip from Fred). Once Kenneth was in the machine he started his stand up act. His jokes had long rambling set ups that usually ended with little or no punch line. He did get one or two laughs though. After getting a few spanks Howard said he had had enough. Artie said he hoped that Kenneth was ready to do this in front of 2,500 people tomorrow night. Kenneth said that he thought his material was as least as good as Bill Cosby's or George Carlin's. Artie laughed and said that Kenneth should say that on stage. Howard suggested that Kenneth just memorize an old Richard Pryor act and do that on stage. It would be funny to hear Kenneth say he's a black kid who grew up in a whorehouse. Kenneth said he knows he has to write better jokes. He said that he's just getting into stand up to meet chicks. Artie reminded him that being funny helps too but Kenneth said he hadn't thought about that. Howard played Kenneth a few jokes from Jackie the Jokeman's joke machine and told Kenneth to just bring that on stage and lip-synch to it.