Dance like nobody’s looking

This is an aphorism I just don’t understand. If no-one is looking there is no way I am going to choose to dance just for the joy of it, because i find no joy in jigging about a bit for no reason. As far as I’m concerned, dance is a reason for clodhopping misery more than anything else. As ever, when I come across a bit of popular wisdom which after a moment’s thought turns out to be pure nonsense, I make fun of it.