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Anonymous File :-(, x)
The most comprehensive and well-controlled penis size study to date showed that there are "showers" and there are "growers." For instance, a grower might be 3" flaccid and 6" erect; whereas a shower might be 5.5" flaccid and 6" erect.
Here's the kicker: average penis size (length) only differed by like 1" or less across populations (white, black, asian), but the different pops had wildly varying distributions of "showers" and "growers." Asians were mostly "growers" and had slightly shorter penises. Blacks were mostly "showers" and had mid-length penises. Whites were a mix of "growers" and "showers," but showed the largest average penis size. We can speculate these physiological population aspects are derived from the disparate environments in which these populations evolved -- asians in cold climates where a shrunken penis confers some advantage, blacks in warm climates where everybody goes mostly nude so its advantageous to have a "shower" and attract mates, and whites with a lot of genetic diversity having spread to many different areas, evolved, and cross-bred through successive generations.
You can imagine "showers" tend to be perceived as having larger penises because the flaccid state is what most people see through swimsuits, in the locker room, groping in a dark bar, etc. Hence the unfortunate misconceptions that asians have tiny penises and blacks have huge penises.
The study by Paul Jamison and Paul Gebhard was published in the Journal of Sex Research (1988).
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