Also, many researchers believe that those who are willing to participate in a study about penis size may have larger than average penises, which would also skew the results.

还有，许多研究者认为那些愿意参与研究小弟弟尺寸的人也许拥有比一般要大的小弟弟，这同样也会影响结果。

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You can find strong statistics, and useless investment signals from butter production in Bangladesh, the US population of 9 year old kids, and now, in a dramatic breakthrough, relating average penis size to GDP growth, a key measure of stock market returns around the world.

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