Book excerpt: With the same saucy, tell-it-like-it-is appeal of He's Just Not That Into You, sex author Kate Taylor explains reasons to keep your clothes on in laugh-out-loud detail: how Oxytocin -- the Fatal Attraction hormone -- can make women up to ten times more emotionally attached after sex than men; why men never expect to get lucky on the third date, or any date; that relationships are more fun, easier and longer-lasting when you keep your feet on the ground instead of hooking them round his neck. An absolutely unique plan for making sure Mr. Right is more than Mr. Right Now: The Rules for how, why, and when not to have sex, this completely original take on an age-old concept offers: an Extreme Dating Makeover, a Q&A for skeptics, tactical plans, "questions to say yes to before you say yes to him," what to do on those third, fourth, tenth -- dates when nookie isn't in the plan, and "I told you so" success stories, ultimately helping you to figure out the perfect time to have sex.