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On Pornhub, Math Teacher Makes His Mark Teaching Calculus

Taiwanese math teacher Changshu explains difficult math in fully-clothed and safe-for-work lessons

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A fully-clothed Changhsumath stands before a chalkboard on which math problems are written.
Hot stuff.
Screenshot: changhsumath666/Pornhub

When you think of Pornhub, you probably think of pornography, right? For good reason, the site is wall-to-wall porn. But one math teacher named Changshu noticed something was missing: math.

“Since very few people teach math on adult video platforms, and since there are so many people who watch videos on them, I thought that if I uploaded my videos there, a lot of people would see them,” Changshu told Mel Magazine (via Gigazine). He has tried taking his lessons to other adult platforms like XVideos, but those sites apparently don’t allow non-adult clips. Pornhub is much more welcoming.

Under the handle changhsumath666, the 34-year-old math teacher’s verified account has netted over 1.7 million views, and features the slogan, “Play Hard, Study Hard!”

Each video is surrounded with ads of things like “Live Sex,” but in Changshu’s videos the only explicit things are numbers. He appears in clip after clip in his gray hoodie and glasses, carefully explaining things like the differential methods, in his native Mandarin.

“People may not be interested in my videos, but they’ll all know there’s a teacher who teaches calculus on an adult video platform,” he added. By his estimation, well over half of his viewers come for the novelty of seeing hard math taught on Pornhub. That does mean that the rest of his viewers could be deliberately choosing to learn Calculus on an adult platform.

The goal is for viewers to sign up for Changshu’s online course, which nets him over $250,000 a year, which he uses to pay his staff and produce the math videos.

“I didn’t want to teach math on Pornhub,” he tells Mel Magazine. “I wanted to let the world know that I’m a teacher from Taiwan who can teach calculus well.” Hey, who said math wasn’t sexy?


You can follow Changshu on Instagram, here. If you want to check out his lessons, minus the Pornhub, Changshu also has a YouTube account.