That's disturbing.
I chaparoned an event last weekend that my daugher was attending. I was blown-away by the little 12-14 year old girls who got out on the dance floor and ground against each other. They had their hands all over each other as well. The wierd thing was, when they danced with boys they reverted back to the old "high school hug" style of dancing where they put their arms around the boys neck and just swayed from side to side.