Article continues below advertisementDax Shepard revealed he once overheard Billy Crudup in the throes of passionate love-making. During the Monday, November 17, episode of his "Armchair Expert" podcast, Shepard, 50, recalled the intimate situation, telling the 57-year-old Jay Kelly star, "I one time had the rare honor of hearing Billy make love." "I want to keep it as clean and not offensive to Billy as possible," he said. "But I've never ever, ever heard someone receive that much pleasure in my life."The Parenthood alum then admitted, "I felt very inept and insecure.