Nations consent to peace treaties. People consent to used car deals. People do not consent to sex. Sex is not about harmony. Sex is dirty.
Sex is rough.
In our common conception of sex, someone is on top and someone is at the bottom. Sex is never obtained without some sort of coercion be it physical, moral, economic or psychological. What cases like Jorgenson's demonstrate is the difficulty in using consent and coercion as standards by which we measure the legality of sex. I'm not suggesting that we should revoke all sex codes, but rather that we examine how they might work to empower or disempower people. We need to consider how well sex codes apply to real-world sexual experiences.