But nearly 40 moms have gone a step further, recording themselves hitting and slapping their kids as part of a new study on how parents and children interact.

Each day she opened one of them, until she had made the round of the twelve.

I didn't touch his head, no beat him on the head? She said: "when the time comes to play silly, you have him for a lifetime, and fan your elder sister go to!" this is a mother? Teach a small to large.