Does it pay to be jealous? Nobody's saying to go psycho, but letting a guy know you care enough to "claim" him can help deter him from straying.(COSMO NEWS)(Brief article)

According to an essay by Dean McDermott's ex-wife, Mary Jo Eustace, in a new book, The Other Woman, in 2005, Mary Jo encouraged Dean to befriend his new costar Tori Spelling. She even took it in stride when he told her that Tori was "fun, caring, and much hotter in person." In hindsight, that was a bad move. (For anyone who's been living in a cave, Dean left Mary Jo and married Tori.) A year later, Reese Witherspoon may have encountered a similar problem when Ryan Phillippe reportedly became close with his Stop Loss costar Abbie Cornish. So the question is, if Mary Jo and Reese had acted more like, well, jealous wives, would their relationships still be intact?

"Jealousy can be dangerous in large doses, but a small amount can ignite passion in a relationship and make partners feel wanted and valued," says Denver psychologist Jennifer Oikle, PhD. Simply put, getting a little worked up when some chick hits on your man says you care. Not only that, but ...