Parents can help their child stay the rebel that society needs to stay healthy, by allowing unfettered conversations going wherever the child’s curiosity takes them.
Were such an unlikely issue ever to arise, we would talk about it. And it would be an enjoyable conversation in which I am assuming that my child is well-intentioned. Sometimes a child might be exploring an idea thought-experiment style, or wondering what makes something seem wrong, or why someone might want to do something. Playing with ideas is a joy for all of us, especially children lucky enough to be in an environment in which it is safe to think about and to discuss potentially difficult or controversial issues.
We look at our respective reasons for wanting what we initially want, and we create a way to proceed that we all prefer—a new idea that did not exist at the outset.