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I think that had to do with eliminating for factors like differences in stimulation for erect height.
I was always confused with people getting excited over flaccid measurements. When a guy is erect, the flaccid measurements don't matter anymore. It's the size of the dick when it's erect that matters, not when it's flaccid.
I would like to know the average length when submerged in cold water. That's the only measurement that matters.