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发帖数: 5516 | 3 这项研究怎么做的？看小日本的工口漫画？
female assessment of digitally projected life-size, computer-generated
images,
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Penis size interacts with body shape and height to influence male
attractiveness
Brian S. Mautza,1,2,
Bob B. M. Wongb,
Richard A. Petersc, and
Michael D. Jennionsa
Author Affiliations
Edited by Wyatt W. Anderson, University of Georgia, Athens, GA, and
approved February 28, 2013 (received for review November 6, 2012)
Abstract
Compelling evidence from many animal taxa indicates that male genitalia are
often under postcopulatory sexual selection for characteristics that
increase a male’s relative fertilization success. There could, however,
also be direct precopulatory female mate choice based on male genital traits
. Before clothing, the nonretractable human penis would have been
conspicuous to potential mates. This observation has generated suggestions
that human penis size partly evolved because of female choice. Here we show,
based upon female assessment of digitally projected life-size, computer-
generated images, that penis size interacts with body shape and height to
determine male sexual attractiveness. Positive linear selection was detected
for penis size, but the marginal increase in attractiveness eventually
declined with greater penis size (i.e., quadratic selection). Penis size had
a stronger effect on attractiveness in taller men than in shorter men.
There was a similar increase in the positive effect of penis size on
attractiveness with a more masculine body shape (i.e., greater shoulder-to-
hip ratio). Surprisingly, larger penis size and greater height had almost
equivalent positive effects on male attractiveness. Our results support the
hypothesis that female mate choice could have driven the evolution of larger
penises in humans. More broadly, our results show that precopulatory sexual
selection can play a role in the evolution of genital traits.
genital evolution
multivariate attractiveness
multiple cues
Footnotes
1Present address: Department of Biology, University of Ottawa, Ottawa,
ON, Canada K1N 6N5.
2To whom correspondence should be addressed. E-mail: b****[email protected].
Author contributions: B.S.M., B.B.M.W., R.A.P., and M.D.J. designed
research; B.S.M., B.B.M.W., R.A.P., and M.D.J. performed research; B.S.M.
and M.D.J. analyzed data; and B.S.M., B.B.M.W., R.A.P., and M.D.J. wrote the
paper.
The authors declare no conflict of interest.
This article is a PNAS Direct Submission.
This article contains supporting information online at www.pnas.org/
lookup/suppl/doi:10.1073/pnas.1219361110/-/DCSupplemental.
【在 k**l 的大作中提到】
: Penis size interacts with body shape and height to influence male
: attractiveness
: http://www.pnas.org/content/110/17/6925.short
: 看了看摘要，好像是说如果人至今没穿衣服的话，早进化成驴了
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