{"id":2017,"date":"2013-11-15T11:25:39","date_gmt":"2013-11-15T10:25:39","guid":{"rendered":"http:\/\/junq.info\/?p=2017"},"modified":"2013-11-17T16:13:38","modified_gmt":"2013-11-17T15:13:38","slug":"bonobos-blush","status":"publish","type":"post","link":"http:\/\/junq.info\/?p=2017","title":{"rendered":"Do Bonobos Blush?"},"content":{"rendered":"

Man is the Only Animal that Blushes.\u00a0 Or needs to.[1]<\/p>\n

Right at the opening of the thirteenth chapter of The Expression of the Emotions in Man and Animals<\/em> Charles Darwin wrote:<\/p>\n

BLUSHING is the most peculiar and the most human of all expressions. Monkeys redden from passion, but it would require an overwhelming amount of evidence to make us believe that any animal could blush.[2]<\/p><\/blockquote>\n

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Bonobo at Cincinnati Zoo, CC-by-SA Ltshears<\/p><\/div>\n

Though Darwin affirmed that monkeys may redden from passion, he denied that they could blush in any human way. Maybe it comes as a surprise that even today, almost 150 years after Darwin stated the above-cited, human blushing remains quite mysterious. \u00a0Concerning the human blush there are still many questions very open. In fact, the blush is ubiquitous yet scarcely understood.[3]<\/p>\n

Recently, however, one age-old question concerning blushing \u2013 Do young women blush in the dark?[4] \u2013 was answered positively.[5] The essential apparatus used in this experiment was, of course, a thermographic camera.<\/p>\n

Is blushing indeed the most human of all expressions? The present Question of the Week therefore becomes: Are there no other animals that blush? If we find one other blushing animal, then Darwin got it wrong. And likewise Frans de Waal, who wrote: \u2018The only uniquely human expression, as Darwin already noted, is blushing. I don\u2019t know of any instant face reddening in other primates.\u2019[6]<\/p>\n

The other animal most likely to blush \u2013 or most likely needing to blush \u2013 is arguably the bonobo. Thus remains the crucial problem: How to make a bonobo blush?<\/p>\n

Bonobos prove to be societal and cultural animals. A great part of society and culture is concerned with morals. Morals always involve rules and boundaries. Breaking these rules and crossing these boundaries constitute a moral breach. In humans such a breach might produce a feeling of shame. According to Darwin blushing is associated predominantly with the feeling of shame.\u00a0 The test whether bonobos blush might consequently require (A) a naturalistic observation of one individual crossing a moral boundary while one or more others are present or (B) an artificial experiment in which one bonobo would be forced to commit a moral breach while being observed by other bonobos.\u00a0 The theoretical ground for this test has already been cleared: trichromatic primates can discriminate color changes in the skin of the face and the rump of conspecifics.[7]\u00a0 As bonobos may have more facial hair than humans and as their skin is rather dark blushing may not easily be noticed by a human observer. Here the aforementioned thermographic camera, already successful in solving one question, may come in handy again.<\/p>\n

Wolter Seuntjens<\/p>\n

References<\/p>\n

[1] Mark Twain, Following the Equator \u2013 A Journey Around the World<\/em>. Hartford, Connecticut: The American Publishing Company, 1897, p. 256 (motto Chapter 27 Pudd\u2019nhead Wilson\u2019s New Calendar).<\/p>\n

[2] Charles Darwin, The Expression of the Emotions in Man and Animals<\/em>. London: John Murray, 1872, p. 310. ( http:\/\/darwin-online.org.uk\/content\/frameset?pageseq=338&itemID=F1142&viewtype=side<\/a> )<\/p>\n

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[3] W. Ray Crozier and Peter J. de Jong, The study of the blush: Darwin and after. In The Psychological Significance of the Blush<\/em>. Cambridge: Cambridge University Press, 2013, p. 1. See also: David Huesmann, Why Do We Blush? Question of the Week, 09 September 2013 ( http:\/\/junq.info\/?p=1959<\/a> )<\/p>\n

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[4] Georg Christoph Lichtenberg, Schriften und Briefe<\/em>. Muenchen: Carl Hanser Verlag, 1971, vol. 2, p. 420 (K 115).<\/p>\n

[5] Denise Waechter and Wolter Seuntjens, \u2018Blushing in the Dark: First Experimental Proof\u2019,\u00a0 Annals of Improbable Research<\/em> vol. 9, no. 2, March-April 2013, pp. 6-7. ( http:\/\/www.improbable.com\/airchives\/paperair\/volume19\/v19i2\/BlushingInTheDark19-2.pdf<\/a> )<\/p>\n

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[6] Frans de Waal, The Bonobo and the Atheist: In Search of Humanism Among the Primates<\/em>. New York: W. W. Norton, 2013, p. 155.<\/p>\n

[7] Mark A. Changizi, Qiong Zhang,\u00a0and\u00a0Shinsuke Shimojo, \u2018Bare skin, blood and the evolution of primate colour vision\u2019, Biol Lett<\/em>.\u00a02006 June 22;\u00a02(2): 217\u201321. ( http:\/\/rsbl.royalsocietypublishing.org\/content\/2\/2\/217.full<\/a> )<\/p>\n","protected":false},"excerpt":{"rendered":"

Man is the Only Animal that Blushes.\u00a0 Or needs to.[1] Right at the opening of the thirteenth chapter of The Expression of the Emotions in Man and Animals Charles Darwin wrote: BLUSHING is the most peculiar and the most human of all expressions. Monkeys redden from passion, but it would require an overwhelming amount of… Read More »Do Bonobos Blush?<\/span><\/a><\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[6],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"http:\/\/junq.info\/index.php?rest_route=\/wp\/v2\/posts\/2017"}],"collection":[{"href":"http:\/\/junq.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/junq.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/junq.info\/index.php?rest_route=\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"http:\/\/junq.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2017"}],"version-history":[{"count":11,"href":"http:\/\/junq.info\/index.php?rest_route=\/wp\/v2\/posts\/2017\/revisions"}],"predecessor-version":[{"id":3424,"href":"http:\/\/junq.info\/index.php?rest_route=\/wp\/v2\/posts\/2017\/revisions\/3424"}],"wp:attachment":[{"href":"http:\/\/junq.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2017"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/junq.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2017"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/junq.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}