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.

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Sources:

https://www.eurekalert.org/emb_releases/2018-06/ku-aso052918.php
http://dx.doi.org/10.1098/rstb.2017.0195
https://www.eurekalert.org/emb_releases/2018-06/lsoh-aff060118.php
http://rstb.royalsocietypublishing.org/content/373/1751/20170208
https://janegoodall.ca/our-stories/why-chimpanzees-throw-poop-at-us/