For the best advice on sex, love, dating and relationships we ask two experts with personal experience. Cathi Hanauer is the author, most recently, of Sweet Ruin, a novel about love, marriage, and adultery. Daniel Jones is the editor of both the "Modern Love" column for The New York Times, and Modern Love, an anthology derived from the column. They've been married for 15 years, and together they provide a his and hers take on relationship questions. This round: fatherhood responsibilities. Question: As I lie here at 3:42 a.m. thinking about my breastfeeding wife down the hall losing sleep, I wonder: Do I have any real responsibility to help my crying baby at night when human physiology has not yet provided me with the ability to breastfeed? – R.M., Reno, Nev.