If you've ever envied Sting's sex life, you can stop right now. According to the singer's daughter, her dad knows squat about Tantric sex! Coco Sumner says her father's legendary prowess -- which was said to include eight-hour marathon sessions with his wife, Trudie Styler -- was actually a tongue-in-cheek story fabricated by his pal, rocker-activist Bob Geldof.