(CNN)Parents like to see themselves as purveyors of possibility. We want our children to inhabit a world in which identities are both mutable and equal, and imagination and empathy reign supreme! But young children, as dictated by their tastes in popular culture, have something else in mind. They're drawn to worlds in which identities are fixed, order trumps imagination and transgressions are met with routine punishment. This clash between what parents desire for their children and what children desire for themselves is most easily observable in cartoon preferences. So often, the more parents dislike a show, the more their children...