I find the notion of 17 yr old doing 3some about as disappointing as young women being strippers. But isn't it common sense that strippers have bad dads? It was often neglect and/or bad parenting that lead to girls with low self esteem, why does one's failure in parenting entitle them to more sadistic behavior? It won't help her, certainly not in the long run. Parents have an obligation to act in the interest of their children, not just what feels good in the moment, and the best bet to reduce that kind of behavior is raising their self esteem, not pushing them further such that they might do more self-damaging things just to spite the parents.