Cable’s late-night hosts have been manning the fort while their broadcast-network counterparts take the week off for fireworks-related reasons (we assume). On Wednesday night, Conan O’Brien invited Larry King on the show to talk about the broadcasting legend’s latest endeavor—bedding. O’Brien brought up King’s all-cotton sheets, which make up his “Sleep Like A King” line. Neither the host nor his guest seemed to know much about linens—not even what a thread count is—but talk quickly turned to testing anyway.