PNAS一篇《阴茎大小与体形及身高互作影响男性的吸引力》（Penis size interacts with body shape and height to influence maleattractiveness）在线发表后，世界各地媒体很快跟进科普，并不是因为这篇文章有多少创新点或重大价值，而是因为它具有新闻吸引眼球的要素——“性”。

http://www.pnas.org/content/early/2013/04/03/1219361110.abstract

Penis size interacts with body shape andheight to influence male attractiveness

Abstract

Compelling evidence from many animal taxaindicates that male genitalia are often under postcopulatory sexual selectionfor characteristics that increase a male’s relative fertilization success.There could, however, also be direct precopulatory female mate choice based onmale genital traits. Before clothing, the nonretractable human penis would havebeen conspicuous to potential mates. This observation has generated suggestionsthat human penis size partly evolved because of female choice. Here we show, basedupon female assessment of digitally projected life-size, computer-generatedimages, that penis size interacts with body shape and height to determine malesexual attractiveness. Positive linear selection was detected for penis size,but the marginal increase in attractiveness eventually declined with greaterpenis size (i.e., quadratic selection). Penis size had a stronger effect onattractiveness in taller men than in shorter men. There was a similar increasein the positive effect of penis size on attractiveness with a more masculinebody shape (i.e., greater shoulder-to-hip ratio). Surprisingly, larger penissize and greater height had almost equivalent positive effects on maleattractiveness. Our results support the hypothesis that female mate choicecould have driven the evolution of larger penises in humans. More broadly, ourresults show that precopulatory sexual selection can play a role in theevolution of genital traits.

PNAS：研究发现身材高挑以及阴茎较长的男性最具吸引力

Penis Size Does Matter: Women Find Men With Larger Genitals

Science has spoken: penis size matters, relatively

Science: penis size matters