Huong, 20, has had two abortions in two years. No one had ever talked to her about sex: not her parents, not her teachers – and her friends knew as little as she did.“I was terrified when I found out I was pregnant,” she said. “I think if we had been told about safe sex, we would not have fallen into this trap.”Huong is not alone. A lack of sex education at home or in school has resulted in some young people in Vietnam relying on abortion as a form of birth control, experts say.Talking about…