i am a father and my son, (11) recently told me that his friend Brock knows where babies come from and he wants to know to. me and my wife think he is ready but dont know where to start. do we talk about sperm first of menstration first. Please give me a step by step advise on whatb order i should tell him things in. dont suggest a class, i think it is best me, a guy, have a man to man talk ourselves about changes and sex.