A type of exercise done by koyukkuris before Shitting, taught by their parents.
While it looks like just a silly, happy body movement, in reality it is very important for new born yukkuris as it stimulates the paste inside their bodies and allows them to release their waste much more easily, preventing constipation.
It is more common among wild yukkuris, who are wise enough to educate their children about survival methods.
