Ok so that's scientific and rational lolthe article I read defined dancing as:
"Dancing" is an untutored, spontaneous response where the animal moves on the beat, matching motion to music. So the animal can't have a trainer. It can't have a human in the room whose moves it copies. It can't spend weeks exposed to the same tune. And when the music changes, it has to change with it, sticking to the beat. The "dance" is triggered by sound, but the moves come from inside — from circuits deep in the dancer's brain.