Has your marriage lost its spark? You're in luck, because Yahoo News is reporting that a new book, Lube Jobs: A Woman's Guide to Great Maintenance Sex is a how-to manual instructing couples how to jump-start their sex lives. "Most women don't appreciate how important sex is to men," says one of the authors (the other author is her husband, natch.) The manual, which bills itself as a "lighthearted" guide, includes "maintenance sex coupons" that can be left discreetly around the house. Several questions: Do people buy this crap? Why are books like this always targeted to women? And honestly: What would the average dude do if he came home and found a blowjob coupon in his sock drawer? [YahooNews]