"Don't think of yourself as damaged goods, don't torture the new guy for your ex's misdeeds, and even though you're craving intimacy like chocolate cheesecake after a month of Atkins, don't give up the goods on the first date." Oh, and while you're at it, steer clear of these back-on-the-market buzz kills: How to spot him: He'll tell you within the first ten seconds that his wife ran off with her trainer. Why he's tempting: You have a common enemy: The ex.