Jules Feiffer once did a strip about that. This middle aged man telling how all his life he'd made out to his son that he had these rightwing views about everything, so as to ensure that the lad grew up reacting against him, and adopting right-on views instead. So they were always arguing about everything.

And then when his son was old enough he told him that he had convinced him, and at last he was able to come out as the liberal he had always secretly been.

And the last frame had him sadly saying that now they agreed, they never seemed to have anything to talk about.