This story didn't go viral because the word "sex" was in the headline. First of all, it's not a sexy story. It's about sex education differences between two countries. Second of all, I've written about sex many times and many of those stories earned modestly.

For more about how I did it: https://medium.com/minds-without-borders/what-its-like-to-write-a-viral-story-a29be61f86ba