Louis C.K. was on Late Night with Seth Meyers Monday, and during the visit he took some time to reminisce about his days writing for the show, back when it was still Late Night with Conan O'Brien. It was the ‘90s, he was a young comic, and he spent his time trying to sneak jokes past his superiors. One night, he and a friend managed to get a particularly dirty one on the air, and…well, just watch him explain it, and try to keep track of the number of times he says “pearl necklace.”