By Seema Mehta, Times Staff Writer October 17, 2006 A teenage boy dances behind his winter-formal date, hands on her hips, thrusting his pelvis against her while she hitches up her satiny gown and bends at the waist. Another couple dance facing each other, their bodies enmeshed and their hips gyrating in a frenzy. A boy approaches a third couple, nearly sandwiching the girl between himself and her partner. Teenagers call it "freaking," a style of dance made popular on MTV. Educators call it "simulated sex" that has no place at school dances. This clash between outraged adults and sexualized...