Nobody taught her. She is learning how to deal with the world around her and socialize. She is only two she will outgrow these things hun. It takes time to acclimate thats all. We can help her cope. Hey I almost got her to talk to a little boy today at the playground if that helps. Hang in there. I know it gets to me too sometimes but outward patience will help if she starts to figure it pushes your buttons she will act out in a way we don't prefer more often most likely. Keep plodding parenthood is a looooong strange trip.