The effect music has on you is amazing. It doesn't matter what it is - nursery rhymes, an advert jingle, a pop song or a rock ballard - your face breaks into the biggest smile and you start to dance, whilst exclaiming "Music!" and "I'm dancing!".
Dancing usually means arms lifted with elbows bent like a chicken impression, swivelling from side to side and hopping from one foot to the other. If I join in and dance with you, you invariably start giggling. I guess I'm guilty of 'Mummy Dancing' already!