Gobby John, 32, told Playboy magazine: “That girl is like crack cocaine to me. Sexually it was crazy. It was like sexual napalm.”But singer/actress Jessica, 29, with John in 2006 for a year, has lost two stone – by boxing. She warned him to give her a wide berth or risk a pounding. Jessica twittered: “Interesting day so far...hmm...at least I’m boxing 2 days this week. Watch out.”Can’t wait for round two.