Self-reported measuring is mostly wrong, but the method you're talking about is the correct one. You actually are supposed to measure from the bottom, it's what they call "bone-pressed", so starting from the pelvic bone.I thought most of, if not all of african dick measurements were self reported which doesn't guarantee proper dick measuring. I do remember reading that later, some country, might be nigeria did a proper study and they found them to be less than 6 inches on average. i bet most lengths or reported wrong. Shit measuring from the bottom I can get an inch and a half more "length" if not more