I would never judge dick by their size. When I met my wife I needed at least 20 or 30 minutes fucking to make her cum at first. My dick isn't short (it has 17 centimeters long and it's a quite fat). Her ex black boyfriend before me, who had a dick a little shorter than mine, just needed one or two minutes to make her cum. He had more experience in sex than me, so he knew how turned her on.