Understanding Sex — just the word alone can be controversial. Parents want to know what to tell their children about sex. In turn, kids want to know all about sex: what is it, why people do it, how should it fit into a healthy lifestyle, and how old you should be to start having sex. These are big questions, and the articles below should help you formulate a basis for answering them, whether for yourself or for a child in your life.Understanding Sex — just the word alone can be controversial. Parents want to know what to tell their children about sex. In turn, kids want to know all about sex: what is it, why people do it, how should it fit into a healthy lifestyle, and how old you should be to start having sex. These are big questions, and the articles below should help you formulate a basis for answering them, whether for yourself or for a child in your life.