I was at a wedding last October and noticed that when kids dance nowadays they don't talk, they don't touch, they don't even look at each other. Just like being married for 30 years.
It's not just kids. I did dance once this summer at a party filled with adults over the age of 25 (a lot in their 30s and 40s). Everyone just moved around without touching. The last time I danced before that was about 3 years ago at another party - and people just moved around without touching. I think the last time I actually touched someone while dancing was when we waltzed and polka-ed in high school PE class.