The first chart has the greatest degree of scientific method behind it. Dildoes of various sizes were used, and both vaginal wetness and pupil dilation were measured, which is how they came up with the results. The second chart is just anecdotal, which means its subject to the error that women sometimes don't truly state the penis size ranges that are ideal. It's hard to think that we're well hung, and yet the majority of women would prefer bigger still if they could find i, but that doesn't mean we aren't satisfying to the women who love us.