why do sims like music and dancing so much?

Since Sims is supposed to be a life-simulator, I would have to say it's a human-thing.

I never play with in game music on - it's an old habit from the days when I often recorded for my video productions, and due to copyrights I did not want to take the risk of music playing in game. I rarely re member to give my sims a stereo, but some got their music machines and I can see those notes floating, but I don't think I saw sims dancing or in any other way being obsessed with the music. Except from toddlers, they often love to dance and I let them as I guess it builds motor skills. Anyway, I think our sims might reflect our focus, so if you focus on your stereo by moving it, replacing it or even switch channels often, those actions might cause your sims to dance more. *I think*