Julia Sweeney considered herself an enlightened, sex-is-no-big-deal kind of parent. But that was before an innocent question about tadpoles prompted The Conversation One evening, on a school night, when my daughter Mulan was nine, we were eating dinner together at our favourite Thai restaurant. It was autumn, over two years ago, and writing about it now I see that Mulan and I interacted much like two roommates. We ate out a lot. We had a handful of favourite places. When you’re a single mother who primarily takes her daughter to dinner at restaurants (my meagre defence: I was spending four days a week driving her to gymnastics after school – 45 minutes each way – so, who had time to cook?), it’s easy to think of yourselves as a couple. You eat, you talk, and sometimes you just stare at each other in a stupor of familiarity. At the restaurant, we know the owner and chef, who this night recommended the frogs’ legs in hot peppers. We politely declined. Mulan told me