For a slideshow of World’s Sexiest Beaches, click here. and rock fronted by a $20-million mansion: 9.8. Pillow talk: Position yourself on the same beach as the stars’ homes. The Malibu Beach Inn is owned by movie mogul David. "Why did I buy this house? It’s not like I need another one," Sjoberg. Lars Sjoberg’s passion for old houses has taken him on a lifelong busman’s holiday, and now that…