What is love, exactly? What does it look like? It all depends on who you're asking. "Some say it's a chemical reaction," says Oprah in this video clip. "Nietzsche says there's always some madness in it," adds Rainn Wilson. He is executive producer and founder of "SoulPancake," a new talk-variety show that explores life's big questions. Tune into OWN for a special hourlong presentation of "SoulPancake" on Dec. 16 at 12 p.m. ET.