So, I’m going to recommend that you not get your definitions from New Yorker articles. Affirmative consent means getting a “yes” and is the opposite of passive consent, which means not getting a “no.” What you are actually asking about is called continuous or ongoing affirmative consent, and the article you have plagiarized in your description summarizes it in words meant to keep its audience comfortable rather than accurately portray the legal standard that California and New York have put in place. Though in the author’s defense, those who teach students about continuous affirmative consent often share the delicate sensibilities of the average New Yorker reader and so fail just as spectacularly at conveying the idea properly.
Continuous affirmative consent doesn’t require a checklist or a law degree. It has two main goals: to change the standard from “did they say no?” to “did they say yes?” and to make it clear that consenting to dinner is not consenting to kissing, consenting to kissing is not consenting to fondling, and so on. And I should point out that even “did they say yes?” is misleading because continuous affirmative consent, both in theory and in what is now legal practice in two states, does not require verbal consent in all instances. The only requirement is that there be unambiguous communication at each stage of the encounter. And really, anyone who gets ambiguous feedback during sex should know to check in with their partner(s).
So to answer your questions: is it a solution to ending sexual assault on campuses? Yes, but it’s not the solution. It’s just one among many because the problem doesn’t have a single cause. Teaching and requiring affirmative consent (continuous or otherwise) can’t stop people who don’t care about consent in the first place. If someone is willing to drug their target’s drink, education isn’t going to stop them (even if they get more than the standard “video followed up by an awkward Q&A” routine). But a lot of kids enter college with some pretty fucked up ideas about sex, and you can prevent a lot of unintentional trauma by correcting those who just don’t know any better.
Is this at all a realistic goal for sexual encounters? Yes, when properly understood. But the idea tends to be poorly taught, has largely been misrepresented by the media, and few people are intellectually motivated enough to get off their ass and research the idea for themselves before going along with the critical flow. (That’s why I’m always such an asshole, by the way. It gets people riled up enough to independently look for information in the hopes of proving me wrong—which shouldn’t be too hard considering that my only real expertise is in being annoying.)
Have I ever practiced affirmative consent? I’ve only practiced affirmative consent, and I didn’t need a seminar to do it. All it takes is some attentiveness and some consideration. Your partner makes a strange noise? It doesn’t take much to ask, “you good?” Your partner’s moaning seems a little off? “Hey, you wanna switch to something else?” Not sure if you’re hitting to hard with the whip? Take the gag out of their mouth and give them an opportunity to say the safe word. (Just kidding. Gag play should always be accompanied by a non-verbal safety cue.)
And as a final thought: maybe you disagree, but I don’t think that caring about the wellbeing of your partner(s) is contrary to human nature.
I do always find it interesting, though, how many men seem to be of the opinion “if that’s consent, then I’ll stick to rape.”