Life becomes a juggling act once lil ones enter the picture. But the act that brought you baby needs to remain a constant in order to maintain your relationship. As we approach Valentine's Day, there's no better time to evaluate the current state of your union. According to sex therapist and GoodinBed.com contributor Dr. Ian Kerner, "Routine, predictability, and patterns of behavior are really important to relationships, especially after you have a baby when everything becomes scheduled. But that kind of routine really works against the spontaneity and unpredictability of sexual attraction." Here are his five reasons to have sex.