You might think something is so "icky" that you try avoid it, and scientists think there's a reason humans, and even some other animals, do this. Head to scishowfinds.com/ for hand selected artifacts of the universe! Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Lazarus G, Sam Lutfi, Nicholas Smith, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: www.eurekalert.org/emb_releases/2018-06/ku-aso052918.php dx.doi.org/10.1098/rstb.2017.0195 www.eurekalert.org/emb_releases/2018-06/lsoh-aff060118.php rstb.royalsocietypublishing.org/content/373/1751/20170208 janegoodall.ca/our-stories/why-chimpanzees-throw-poop-at-us/

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