Alright I'm going to catch some flak for this because anytime I try to explain humor like with the "Pizza sluts" thing I get downvoated to shit. But Bob Saget, even though he was in Full House, has a very dark side to his comedy. Watch some of his recent standup or his "Aristocrats" joke on youtube and you'll understand. He'll pretty much say anything that's dark, morbid, and gets a reaction.