What depths has the anus song? This study takes a look:
” ‘Everybody, Let’s Tighten the Anus’: Exploring the Social and Cultural Meaning of a Korean Folksong,” Joonseong Lee [pictured here], Journal of Media and Religion, vol. 11, no. 4, 2012, pp. 216-230. The author, at California State University San Marcos, explains:
“The immanent approach to the anus song with the view of Eastern qi philosophy provides this research with a cogent theoretical framework for energy spirituality, which is constructed in the practice of breathing, including anus breathing or anal sphincter exercise.”
Here is a performance of the song:
BONUS (possibly related): Song on the anus.