My boyfriend and I have been together for a while now. Before me, he had received several bjs but I had never even seen a penis. About a month ago, I started giving him bjs but since he's my first, I'm not very good yet. He warned me beforehand that he has a lot of stamina and has never cum from a bj without having to finish himself off. I've read a lot of things and even watched some videos but it's still not doing it for him. It seems like everything I read says the same thing over and over again. Any advice??