We have three kids to get out the door in the morning and into bed at night, and the two which are talking in full sentences are perfectly cable of yelling "why?" and arguing forever every single time they are asked to come for breakfast/lunch/dinner, eat their greens, put on their socks, brush their teeth....they know why. All of these things have been explained a myriad times. I make my stand that finally yelling "because I said so!" on behalf of a frustrated parent is a reaction to being bullied!