I've always been a fan of the phrase, "work smarter, not harder" and I think this guy is doing exactly that. 34 year old, Taiwanese calculus teacher, Changshu teaches math but in a place you'd never expect. Apparently, you can post anything to Pornhub and Changshu has found his niche doing that. I can't imagine too many other math teachers uploading to such a space (unless, of course, it isn't math) so he's bound to get a lot of traction. So much traction, in fact, Changshu is bringing in over $250,000 a year. I think we're all doing it wrong. More below.