Your son is getting older. It is time someone sat down with him and teach him about growing up, sex, and his responsibilities. It is best presented by a man from a man's point of view. I recommend the material in Growing Up in the Lord: A Study for Teenage Boys because it was written just for this purpose. At a minimum have him read the book, and more importantly the passages cited from the Bible. If you don't have a trusted adult male who can go over the material with him, I am willing to have the discussions with him in person if you happen to be in my area or via Skype. Or, again at a minimum, have him read the material on this website and especially have him read the questions and answer sections that accompanies each chapter. If he has his own questions, he can send in an email to have it addressed.