>>13932628dancing and music are tied and it happens that the movements are in beats just like music if not in sync with a song
animals tend to express or communicate using patterns, and differences between patterns and species helps improve the signal to noise ratio.
idk if science can explain that dance or any dance, for humans skipping legs is common even outside of dancing, locking sholders and swinging arms is a typical white girl awkward dance and the cheerleader thing is very very common in the west. regardless of my opinion it's probably a simple pattern to execute given the human muscle and skeletal structure. An emotionally stimulated person trying to outwardly express themselves to music will do what feels natural, assuming occams razor.
